I have some strange problem... Something similar. Some days I have 21 megs free, and others I have 16... I followed the how to optimize you're blackberry memory guide, and I did free up a lot, but still. I don't know where these megs are going! these are the applications I have installed:
(besides blackberry core and system software)
Calendar OTA Patcher
That's it! as you can see all I have are some Google things and Jivetalk! And I just did a hard reset and it's at 18! arggg... No idea!!!! Any ideas? I love memory!!!