plugin manager + options, form selections not saving

this is odd.

I set one of my plugins w/in the plugin manager to "All Users" vs. "Auto Activate(All Users)" to test its behavior with new blogs. I tried switching it back to Auto Activate, clicked save... and it's still set on All Users.

Additionally, in my admin options, I set the checkbox to reveal the plugin menu in member blogs. Worked fine. But, now I'm trying to uncheck it... I do, click save, but it remains checked.

any ideas what's going on... & how to fix it?