First off I did do a bunch of research..no joy on this issue.
First issue: is that some apps disappeared after I flashed the ICS rom.
Second: when trying to download and install I get "ERROR Couldn't install on USB storage or SD card" (Where's My Water) or "This device is incompatible". i just downloaded the Android Central app..it doesn't shop up in my Installed app list in Play. the app will work until I reboot the phone then the app disappears.
I've done everything I can think of, delete data in Play app, totally reformat SD card, factory restore and reinstall ICS. No fix.
I'm guessing it is the apps..not setup for ICS.
BTW: Everything worked running CM7.2 and CM9 nightly.