I have 21mb free memory on my Curve but it's still lagging. For example if I'm typing or selecting an option using the trackball, it will the the BB a few seconds extra to catch up.
If anyone can offer any advise it would be appreciated..
did you read john clark's thread on how to free up memory ? and do you do a battery pull every so often? and also make sure you clear your cache, call logs and messages frequently