I've been having problems recently with my JBreaked iPhone. (3G / 16 GB / 3.1.2 / 05.11.07) I have Memtool installed as well as the available memory displayed on the top of the screen. The available memory used to run/average around 64MB, and the apps displayed in Memtool (Springboard, MobilePhone, and others) would add up to about 64MB 64+64=128 However, my available memory has been displaying as being in the high 30's, low 40's lately. I go into "Memtool" and add up the amount of memory being used, and it's still about 64MB, yet available memory is about 40MB nowadays. Where did 24MB of RAM go? My phone does not appear to be running slow or suffering a loss of performance, but why are at least two different apps showing on average 40MB available when I used to see 64MB available? As mentioned, no extraneous processes running, and the ones that are add up to about 64MB as they always did. So, where's the 24MB RAM?