I'm having similar problems with Twimgo, Witter, Tweedsuit and Khweeture (forget the spelling of the last one). I get a 404 authorization error message and am asked to check the username and password. They are correct. I have been using these programs for years with the same info. I can open a browser and access twitter with no problem. Suggestions?

Edit:

jpala16 comments in the Twimgo thread that he removed Twimgo and then

"I realized that some packages were said to be not necessary. A lot of packages named as "libqtm-11-*". Today I uninstalled them, saw that fMobi stopped working, and installed them again by installing "libqtm-11-declarative". The rest were installed as dependencies, I think. Now TwimGo is working."

I have a feeling my problem is similar, but I tried his solution a couple of times and it didn't solve my problem.