CLI upgrades and installations work just fine, as does Synaptic, etc.

When I open Update Manager, it checks for new updates just fine, also, but when I click "Install," and the authentication window pops up, there is no field to enter the password. Closing out and retrying later, the authentication window pops up (again, without a password field), shakes back and forth rapidly, and disappears.

The same thing happens with the software center. No error messages or anything with either of them, though.

I've tried reinstalling the update manager from Synaptic, but to no avail.

I'm running Ubuntu 10.10 64-bit (with the server kernel, because for some reason VirtualBox seemed to want it).

Any ideas, guys?

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I need to read more carefully.