Newbie - some advice please

Finally got round to installing TB 1.5.0.4. Lots of things I like about
it, have set it up to use different quote level colours and that's made
a big difference in long threads. One thing I can't work out....

I subscribe to a number of NG's and some are similar (i.e. games).
After reading one group I'll go to another and find I have to read a lot
of the same threads/posts all over again. This is really annoying. OE
recognises these duplicate posts and automagically marks such crossposts
as read. I can't believe OE does something better than TB so how do I
get TB to do something similar?

Many thanks for any help and advice. Shawk

Shawk