I can not delete nor save anything on my playbook. I try to delete an item, it disapears for the moment, and when i restart application, the file is back again.
Seems like some memmory failure. Same when i try to save anything....any application just blocks....
Have you tried the 3-finger restart or reboot? That is different from just using the power button or using the BatteryIcon Restart choice:
To REBOOT: Press and HOLD all three keys for about 10 - 20 seconds: PowerOn, VolUp and VolDown. If you hear a shutter type sound, you've taken a Screen Shoot and probably missed the PowerButton.
I had that happen to me when i copied a video to my playbook. I would delete from my playbook but when i exited the video application and went back back to my videos the video would re appear (video would not play so it might have caused an issue with the pb). But when i deleted the video straight from my PB when I accessed it through my computer it never came back.