have you tried clearing the market app cache?

550mb free space, did you mistaken ram memory as cache memory?
they're not the same thing just in case you thought cache = ram

This post has been edited by phantomash: May 31 2011, 09:22 PM

well then if you're an IT guy, you should know that deleting files or uninstalling apps doesn't affect the cache memory 1 bit

your cache size cannot be 550MB free, because it shouldn't even be that big, lol which is why I know you must've mistaken it for something else
cache memory are temporary memory that is part of your internal storage, you can't just free it by deleting stuff
which is why you need the cache cleaner app. you can do it manually too if you can use recovery or adb
(there could be other ways as well, feel free to correct me)

This post has been edited by phantomash: Jun 1 2011, 09:14 AM