I am currently using PDADefense with the Treo 90 and am having problems with the Smart lock feature with is supposed to allow optional locking when the power button is pressed, while still using the "grace period" for auto shutoff. The lock is being activated at both manual and auto shutoff with no grace period. I spoke with support at PDADefense and they said they will look into it. Just wanted to know if anyone else is having the same problem.