dharma:

Though I have never witnessed this behavior personally I have heard a few folks say this has happened to them with other admin contributions. As Pixxi says I doubt this has anything to do specifically with the UT mod, but more likely something to do with session configuration or contributions that somehow affect the admin sessions causing the admin session to expire to quickly.

I can only suggest examining the configuration for configuration -> mystore -> Admin Session Time Out in Seconds and search the forums for "admin session timeout" where you will find much information.

Are you using any contribs such as admin profiles? If so you might check that thread to see if there are answers there...

Hope this helps!

Jeff