[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] M66B:
Since apps on external storage are stored in .android_secure here a listing of mine:

~ # ls /storage/sdcard0/.android_secure -al
d--------- 2 root root 40 Aug 19 17:43 .
d---rwxr-x 35 system sdcard_r 8192 Aug 20 18:45 ..

Maybe yours doesn't exist or does have another owner/other permissions.

---------- Post added at 07:50 PM ---------- Previous post was at 07:38 PM ----------

I am not sure what to look for (there is a lot of logging), but something like this:

~ # logcat -c
~ # logcat | grep -E '(Vold|rodekruis)'
W/zipro (15274): Unable to open zip '/mnt/asec/nl.rodekruis.android-2/pkg.apk': Permission denied
I/NativeLibraryHelper(15274): Couldn't open APK /mnt/asec/nl.rodekruis.android-2/pkg.apk
W/ActivityManager( 331): No content provider found for permission revoke: file:///mnt/asec/nl.rodekruis.android-2/pkg.apk
D/VoldCmdListener( 131): asec fixperms nl.rodekruis.android-2 10054 pkg.apk
I/PackageHelper( 331): Forcibly destroying container nl.rodekruis.android-1
I/PackageHelper( 331): Failed to destroy container nl.rodekruis.android-1
D/VoldCmdListener( 131): asec destroy nl.rodekruis.android-1 force
E/Vold ( 131): Couldn't find ASEC nl.rodekruis.android-1
D/VoldCmdListener( 131): asec create nl.rodekruis.android-1 7 ext4 {} 10054 1
I/Vold ( 131): Filesystem (ext4) formatted OK
E/VoldConnector( 331): NDC Command {92 asec create nl.rodekruis.android-1 7 ext4 ad76c60ef22e73224236d413cce01e9f 10054 1} took too long (1264ms)
I/PackageHelper(15274): Created secure container nl.rodekruis.android-1 at /mnt/asec/nl.rodekruis.android-1
D/VoldCmdListener( 131): asec path nl.rodekruis.android-1
I/DefContainer(15274): Created container for nl.rodekruis.android-1 at path : /mnt/asec/nl.rodekruis.android-1
I/DefContainer(15274): Copied /mnt/asec/nl.rodekruis.android-2/pkg.apk to /mnt/asec/nl.rodekruis.android-1/pkg.apk
I/DefContainer(15274): Copied resources to /mnt/asec/nl.rodekruis.android-1/res.zip
D/VoldCmdListener( 131): asec finalize nl.rodekruis.android-1
I/DefContainer(15274): Finalized container nl.rodekruis.android-1
I/DefContainer(15274): Unmounting nl.rodekruis.android-1 at path /mnt/asec/nl.rodekruis.android-1
D/VoldCmdListener( 131): asec unmount nl.rodekruis.android-1 force
W/ActivityManager( 331): No content provider found for permission revoke: file:///mnt/asec/nl.rodekruis.android-2/pkg.apk
D/VoldCmdListener( 131): asec fixperms nl.rodekruis.android-2 10048 pkg.apk
D/VoldCmdListener( 131): asec mount nl.rodekruis.android-1 {} 1000
D/VoldCmdListener( 131): asec path nl.rodekruis.android-1
D/VoldCmdListener( 131): asec fixperms nl.rodekruis.android-1 10048 pkg.apk
I/ActivityManager( 331): Force stopping package nl.rodekruis.android uid=10048
D/VoldCmdListener( 131): asec unmount nl.rodekruis.android-2 force
E/installd( 142): Couldn't unlink /data/dalvik-cache/mnt@asec@nl.rodekruis.android-2@pkg.apk@classes.dex: No such file or directory
I/PackageHelper( 331): Forcibly destroying container nl.rodekruis.android-2
W/PackageManager( 331): Couldn't remove dex file for package: at location /mnt/asec/nl.rodekruis.android-2/pkg.apk, retcode=-1
D/VoldCmdListener( 131): asec destroy nl.rodekruis.android-2 force
I/InstalledAppDetails(15246): Moved resources for nl.rodekruis.android
D/VoldCmdListener( 131): asec fspath nl.rodekruis.android-1
D/VoldCmdListener( 131): asec fspath nl.rodekruis.android-1

Edit: logging starts just before move and ends after successful move.