I posted this in another thread but here is what worked for me below.
I found if you load the latest icon packager and then open up one of the default logons from C:\Program Files (x86)\Stardock\Object Desktop\LogonStudio\DefaultLogons then apply it it seems to work fine with every logon after that. Go to the directory and launch the logons from there do not try and open them from the app until you at least launch one of the default logons from C:\Program Files (x86)\Stardock\Object Desktop\LogonStudio\DefaultLogons directly from windows explorer. It may take a few tries at aplying the logons.. But... The latest Icon Packager is a bit buggy... I found that my Outlook Icon that is pinned to my start menu stopped working and no longer opens outlook. Then again I use my quick launch outlook icon anyways so it isn't too big of a deal. Here is the kicker though you can't run the logon Vista to change them you go to the directory for the defaul logons to apply them but once you apply the default ones you can add ones you want when the Logon studio Vista launches from opening the default logons.
I have uninstalled and re-installed all the applications serveral times and it works every time following the steps I listed.
I hope that made sense.