Yep still in 1.4.1. I just tried again and noticed another issue. Starting from scratch:
1. Add link "AAA" at "Before tabs at top".
2. Add link "BBB" at "Far end of tabs at top".
3. Add link "CCC" at "Far end of tabs at top".
Now, I have the tabs AAA, then the usual q2a tabs, then on the right CCC then BBB. I would expect BBB to come before CCC (may be this is to do with float:right stuff?) Then:
4. Change CCC to be "after BBB". Ordering is now BBB,CCC.
5. Change AAA to be "after BBB". Now the ordering is BBB,CCC,AAA when it should be BBB,AAA,CCC.