Exclamation [Q] "App not installed"

Sometimes, when I power on the tablet, I see on app menu an alert icon rather than the app icon and when I tap it, appears a notification "This app is not installed on your device", but the app is correctly installed... It's a S1 bug or an Honeycomb bug?

When I reboot, sometimes it's all ok, but sometimes I find (every time a different) app with this problem...

Does APP2SD influence this trouble? I used it to move some app
Only our hatred leads us to victory.

Sony Ericsson XPERIA Mini Pro (SK17i)
CM10 FXP 205 + Lupus Kernel v2

Sony Tablet S (Sony S1) 16Gb WiFi + 3G
ICS 4.0.3 R5a - rooted