About a week ago the hot corner stopped working with the screensaver. Oddly, the screensaver works fine when left for the time to activate, and in the test option. The hot corners work for all other options. The only combination that doesn't is screensaver activated by hot corners. I've tried changing the to different corners, used disable screensaver, nothing seems to have any effect. Other fixes online relate to the dock needed restart, I've tried that and also tried rebooting. HW is a macbook pro i7 2.2GHz, SW is 10.7.5. I get all updates as needed by apple. I like hot corners for locking the mac when nipping away from it, now I need to have it sleep every time I leave it alone.