Every time i try to update a program or install a new one installer gets finished downloading and says installing and it quits to the home screen. The last program it successfully updates was solitaire to version 0.71 and now nothing shows up but the timer and score when i open the application. I have no idea what the problem is but it started acting like this when i tried to install some of the new java software. I really don't want to do a restore but it's looking like my only way out.
I'm pretty sure this is because you don't have enough space in the partition to install what you are trying to install. i.e. you are running out of disk space. This has nothing to do with your overall disk space. Apple has only partitioned a small amount of space to install third party apps, etc...
There is a bunch of info about this and a workaround in the forums.