Preferences constantly get corrupted in PT.

[Benjiman]

Is there something I am doing to cause my preferences to get corrupted all the time? I have to shut down Pro tools and trash the preferences, then start up again. When I do though, I know I am in for it because its bound to happen even faster from there on out.
Im running a Mac G 4 933 and a 733 on OS 10.3 and 9.2 w/ 1 gig of RAM. Pro tools v 6.2.3 and 5.3.1v2 on both systems.
Pro tools HD 5 and Pro tools HD 2. Two systems that are both having the same problems so I know there are answers. This has got to be the most aggrivating thing besides crashing, its very difficult to explain to a customer why in this case.

thanks to anyone who can help,

Benjiman Demman
SonSongs Recording Studio
4970 Arville Suite #103
Las Vegas, NV USA 89118
702.364.2663 Studio

(RTAS Auto tune crashes my computer at startup of pro tools in OS)