[Windows Mobile] michyprima:
I made a small program to compare files/modules size. That's the result (only common compared):

- caulkin 28232 vs 23540 -

- MODULES -
shlwapi.dll is different. (BROWSINGCORE)
bthhid.dll is different. (Bth_HID)
cmhome.dll is different. (CHome)
cmhomewmpplugin.dll is different. (CHome)
ccore.dll is different. (ConfettiCore)
IntShrUI.exe is different. (INTERNETSHARING)
ipnat.dll is different. (INTERNETSHARING)
commctrl.dll is different. (OS)
gwes.exe is different. (OS)
notify.dll is different. (OS)
ossvcs.dll is different. (OS)
quartz.dll is different. (OS)
tcpstk.dll is different. (OS)
cplmain.cpl is different. (Redist)
riched20.dll is different. (Riched20)
aygshell.dll is different. (Shell)
cellcore.dll is different. (Shell)
ceshell.dll is different. (Shell)
citydb.dll is different. (Shell)
compime.dll is different. (Shell)
cspras.dll is different. (Shell)
cspwwan.dll is different. (Shell)
fbrowser.dll is different. (Shell)
gdiplus.dll is different. (Shell)
irsqrt.dll is different. (Shell)
peghelp.exe is different. (Shell)
PhysicsEngine.dll is different. (Shell)
pimutil.dll is different. (Shell)
redir.dll is different. (Shell)
shell32.exe is different. (Shell)
shutil.dll is different. (Shell)
taskmgr.exe is different. (Shell)
sqlcese30.sys.dll is different. (SQLCE)
webview.dll is different. (Webview)
WLMDeckResources.dll is different. (WindowsLive)
WLMMessengerResources.dll is different. (WindowsLive)
WLMSharedResources.dll is different. (WindowsLive)
- FILES -
f50e9a40-aed9-497a-bdea-84451210e960.dsm is different. (BaseApps)
MobileCalculator.exe is different. (BaseApps)
pimdlg.dll is different. (BaseAppsFiles)
b183f2a7-06c3-4f27-9679-7baf97e94efa.rgu is different. (BROWSING)
f3dfc36d-36d0-4163-8d6f-e1ce5aed8814.dsm is different. (browsingie)
f3dfc36d-36d0-4163-8d6f-e1ce5aed8814.rgu is different. (browsingie)
mxip_wpclang_favorites_1000.provxml is different. (browsingie)
7bb5f499-6b7f-4ee0-bcb9-a89ae3fc3e2c.dsm is different. (CommonNonEA)
ed0ab1a4-a456-4fb0-ad9d-93feccf351a3.dsm is different. (INTERNETSHARING)
LS_PhoneAlertScene_480x800.cpr is different. (LockscreenNonEA)
LS_PhoneAlertScene_800x480.cpr is different. (LockscreenNonEA)
LS_PhoneCallScene_480x800.cpr is different. (LockscreenNonEA)
LS_PhoneCallScene_800x480.cpr is different. (LockscreenNonEA)
ae879543-c73e-4888-812b-d8177c404612.dsm is different. (MediaOS)
ae879543-c73e-4888-812b-d8177c404612.rgu is different. (MediaOS)
default.hv is different. (Metadata)
DefaultCerts.dat is different. (Metadata)
packages.cif is different. (Metadata)
packages.sof is different. (Metadata)
user.hv is different. (Metadata)
38f43c9f-bc38-430e-81d1-a2e6c650f225.dsm is different. (NetCF)
331439cf-a636-4243-8424-e501be3a39d2.dsm is different. (Office)
331439cf-a636-4243-8424-e501be3a39d2.rgu is different. (Office)
mxipupdate_office_100.provxml is different. (Office)
mxipupdate_onenote_100.provxml is different. (Office)
office.dll is different. (Office)
officeres.dll is different. (Office)
officeurl.exe is different. (Office)
ofinet.dll is different. (Office)
omurlhandler.dll is different. (Office)
ppt.exe is different. (Office)
pword.exe is different. (Office)
spapi.dll is different. (Office)
spdatastore.dll is different. (Office)
spdocitemsyncctrl.dll is different. (Office)
splistsyncctrl.dll is different. (Office)
spmc.exe is different. (Office)
spsynccore.dll is different. (Office)
spuihandlers.dll is different. (Office)
2f863e61-941d-4fb6-bcdf-35bf606e613a.dsm is different. (OneNote)
d0b41563-b345-4444-aa15-986e7c7fff99.dsm is different. (OS)
d0b41563-b345-4444-aa15-986e7c7fff99.rgu is different. (OS)
mxipupdate_metabase_001.provxml is different. (OS)
2a6583ff-6047-46cc-b9be-b7deca1152c3.dsm is different. (Phone)
d9d7d86d-3f83-4289-bd32-aa1972a1447e.dsm is different. (PhoneRedist)
208f8be6-1362-45b3-ae17-95d4ab426c11.dsm is different. (Redist)
atlce300.dll is different. (RUNTIMES)
atlce400.dll is different. (RUNTIMES)
mfcce300.dll is different. (RUNTIMES)
olece300.dll is different. (RUNTIMES)
1f1aca24-d942-464a-9281-10567741499c.dsm is different. (Shell)
1f1aca24-d942-464a-9281-10567741499c.rgu is different. (Shell)
29356830-10de-437d-ad6a-6c7d60a7dea4.dsm is different. (SqlCeMobile)
29356830-10de-437d-ad6a-6c7d60a7dea4.rgu is different. (SqlCeMobile)
dbnetlib.dll is different. (SqlCeMobile)
GAC_System.Data.SqlClient_v3_0_3600_0_cneutral_1.dll is different. (SqlCeMobile)
GAC_System.Data.SqlServerCe_v3_0_3600_0_cneutral_1.dll is different. (SqlCeMobile)
sqlceca30.dll is different. (SqlCeMobile)
sqlcecompact30.dll is different. (SqlCeMobile)
sqlceme30.dll is different. (SqlCeMobile)
sqlceoledb30.dll is different. (SqlCeMobile)
sqlceqp30.dll is different. (SqlCeMobile)
sqlcese30.dll is different. (SqlCeMobile)
7ec02197-7d2d-43a8-9b11-bf3ff9753984.dsm is different. (Webview)
40723732-841f-40d3-8dd0-af7d0d6156de.dsm is different. (WelcomeCenter)
27790533-c966-4097-8a93-c1a83969c574.rgu is different. (WindowsLive)
c536797d-4a69-4e8c-9541-e46f3b4fdc08.rgu is different. (WindowsLiveIM)

- caulkin 28232 vs 23541 -

- MODULES -
bthhid.dll is different. (Bth_HID)
cmhome.dll is different. (CHome)
cmhomewmpplugin.dll is different. (CHome)
ccore.dll is different. (ConfettiCore)
IntShrUI.exe is different. (INTERNETSHARING)
ipnat.dll is different. (INTERNETSHARING)
commctrl.dll is different. (OS)
gwes.exe is different. (OS)
notify.dll is different. (OS)
ossvcs.dll is different. (OS)
quartz.dll is different. (OS)
tcpstk.dll is different. (OS)
cplmain.cpl is different. (Redist)
riched20.dll is different. (Riched20)
aygshell.dll is different. (Shell)
cellcore.dll is different. (Shell)
ceshell.dll is different. (Shell)
citydb.dll is different. (Shell)
compime.dll is different. (Shell)
cspras.dll is different. (Shell)
cspwwan.dll is different. (Shell)
fbrowser.dll is different. (Shell)
gdiplus.dll is different. (Shell)
irsqrt.dll is different. (Shell)
peghelp.exe is different. (Shell)
PhysicsEngine.dll is different. (Shell)
pimutil.dll is different. (Shell)
redir.dll is different. (Shell)
shell32.exe is different. (Shell)
taskmgr.exe is different. (Shell)
sqlcese30.sys.dll is different. (SQLCE)
webview.dll is different. (Webview)
WLMDeckResources.dll is different. (WindowsLive)
WLMMessengerResources.dll is different. (WindowsLive)
WLMSharedResources.dll is different. (WindowsLive)
- FILES -
f50e9a40-aed9-497a-bdea-84451210e960.dsm is different. (BaseApps)
MobileCalculator.exe is different. (BaseApps)
pimdlg.dll is different. (BaseAppsFiles)
b183f2a7-06c3-4f27-9679-7baf97e94efa.rgu is different. (BROWSING)
f3dfc36d-36d0-4163-8d6f-e1ce5aed8814.dsm is different. (browsingie)
f3dfc36d-36d0-4163-8d6f-e1ce5aed8814.rgu is different. (browsingie)
mxip_wpclang_favorites_1000.provxml is different. (browsingie)
7bb5f499-6b7f-4ee0-bcb9-a89ae3fc3e2c.dsm is different. (CommonNonEA)
ed0ab1a4-a456-4fb0-ad9d-93feccf351a3.dsm is different. (INTERNETSHARING)
LS_PhoneAlertScene_480x800.cpr is different. (LockscreenNonEA)
LS_PhoneAlertScene_800x480.cpr is different. (LockscreenNonEA)
LS_PhoneCallScene_480x800.cpr is different. (LockscreenNonEA)
LS_PhoneCallScene_800x480.cpr is different. (LockscreenNonEA)
ae879543-c73e-4888-812b-d8177c404612.dsm is different. (MediaOS)
ae879543-c73e-4888-812b-d8177c404612.rgu is different. (MediaOS)
default.hv is different. (Metadata)
DefaultCerts.dat is different. (Metadata)
packages.cif is different. (Metadata)
packages.sof is different. (Metadata)
user.hv is different. (Metadata)
38f43c9f-bc38-430e-81d1-a2e6c650f225.dsm is different. (NetCF)
331439cf-a636-4243-8424-e501be3a39d2.dsm is different. (Office)
331439cf-a636-4243-8424-e501be3a39d2.rgu is different. (Office)
mxipupdate_office_100.provxml is different. (Office)
mxipupdate_onenote_100.provxml is different. (Office)
office.dll is different. (Office)
officeres.dll is different. (Office)
officeurl.exe is different. (Office)
ofinet.dll is different. (Office)
omurlhandler.dll is different. (Office)
ppt.exe is different. (Office)
pword.exe is different. (Office)
spapi.dll is different. (Office)
spdatastore.dll is different. (Office)
spdocitemsyncctrl.dll is different. (Office)
splistsyncctrl.dll is different. (Office)
spmc.exe is different. (Office)
spsynccore.dll is different. (Office)
spuihandlers.dll is different. (Office)
2f863e61-941d-4fb6-bcdf-35bf606e613a.dsm is different. (OneNote)
d0b41563-b345-4444-aa15-986e7c7fff99.dsm is different. (OS)
d0b41563-b345-4444-aa15-986e7c7fff99.rgu is different. (OS)
mxipupdate_metabase_001.provxml is different. (OS)
2a6583ff-6047-46cc-b9be-b7deca1152c3.dsm is different. (Phone)
d9d7d86d-3f83-4289-bd32-aa1972a1447e.dsm is different. (PhoneRedist)
208f8be6-1362-45b3-ae17-95d4ab426c11.dsm is different. (Redist)
atlce300.dll is different. (RUNTIMES)
atlce400.dll is different. (RUNTIMES)
mfcce300.dll is different. (RUNTIMES)
olece300.dll is different. (RUNTIMES)
1f1aca24-d942-464a-9281-10567741499c.dsm is different. (Shell)
1f1aca24-d942-464a-9281-10567741499c.rgu is different. (Shell)
29356830-10de-437d-ad6a-6c7d60a7dea4.dsm is different. (SqlCeMobile)
29356830-10de-437d-ad6a-6c7d60a7dea4.rgu is different. (SqlCeMobile)
dbnetlib.dll is different. (SqlCeMobile)
GAC_System.Data.SqlClient_v3_0_3600_0_cneutral_1.dll is different. (SqlCeMobile)
GAC_System.Data.SqlServerCe_v3_0_3600_0_cneutral_1.dll is different. (SqlCeMobile)
sqlceca30.dll is different. (SqlCeMobile)
sqlcecompact30.dll is different. (SqlCeMobile)
sqlceme30.dll is different. (SqlCeMobile)
sqlceoledb30.dll is different. (SqlCeMobile)
sqlceqp30.dll is different. (SqlCeMobile)
sqlcese30.dll is different. (SqlCeMobile)
sapi.dll is different. (VoiceCommand)
sapiwavstr.dll is different. (VoiceCommand)
7ec02197-7d2d-43a8-9b11-bf3ff9753984.dsm is different. (Webview)
40723732-841f-40d3-8dd0-af7d0d6156de.dsm is different. (WelcomeCenter)
27790533-c966-4097-8a93-c1a83969c574.rgu is different. (WindowsLive)
c536797d-4a69-4e8c-9541-e46f3b4fdc08.rgu is different. (WindowsLiveIM)

Means that all the rest is the same as 23540/41.

Seems he keep most of the COM5 builds in his WMD sys :)

So that is probably why everything works.