Newb Help: Low on space error

Hello all,

I am pretty new to the android family (six months). My phone has worked great since i got it but recently i've been getting the "low on space" message which is ridiculous because I have plenty of MB left and also have a 32GB sd card in which all the possible movable apps are moved to. I also clear my cache at least five times a month. I googled options to get rid of this error but nothing works. Any suggestions?:


~Phone specs:

Rooted Mytouch 4g
Android version: 2.2.1
SD card storage free: 21.88GB
Internal storage free: 111MB
Internal memory free: 109Mb


I would greatly appreciate any help!