>>Have you tried clearing the browser cache? I suspect that it would clear up one of the problems (where ability to select between UT and C4U is missing).
>
>Didn't have to do that more than once in last ten years, and then it was for the bank. Yup it worked, but then it being such a rare thing, perhaps a warning for those who may not remember to do this would be nice.
>
>>I do suspect that this might not fix the other problem where you're not able to keep the tabs separate (i.e. login on one tab through shared login screen may affect state of a previously-opened tab).
>
>That was not the trouble, the UT tab would be looking into C4u tab after a while. We'll see now.

Actually more trouble. I did clear the cache, and did clear the cookies for levelextreme. Now when I logged into either of them, clicking on a message in the upper pane would give me a "no message corresponds to your search criteria". So OK, I clicked refresh... and got redirected here again.

So it's not just the cache.