Illustrator cs2 frozen tools & pallates

Anyone else have this problem?
I am working on a G5 Tower, Dual 2GHZ with 2.5 GB ram.
I have Tiger & CS2.
Very often when I am working in Illustrator CS2 my tools and pallates suddenly won't move or let me do anything with them. I cannot move them but sometimes can click on, say, swatches.. but i have to aim at a weird place for the right thing to select. a close and reopen fixes this, but sometimes it reappears soon after.

Help! ugh its annoying.