Unable to describe/update apps?

[Dil999]

I recently jailbroke my 1.1.2 iPod Touch, and it worked fine for awhile. Starting sometime yesterday night, whenever I try to install an update, after downloading the application it goes right back to SpringBoard, and in Installer, the application is still listed as not installed. When I tried to download 15 (the game) after several tries the icon popped up on SpringBoard, but when I clicked it about half the tiles were missing.
I have already tried restarting my touch.

[sziklassy]

Most likely running out of space in the applications folder. Download bosstools and let us know what it says (you will probably need to delete a few apps, or at least one hefty one to get it installed)

[Dil999]

Argh, now Installer doesn't work at all. When I try to run it it goes into a white screen for about 20 seconds, and then goes back to SpringBoard. I have already tried re-jailbreaking my iPod (thought it would help), but nothing works. Any ideas on how I could fix/reinstall the installer application without restoring?