Well, you can create cell wrappers to go around your tables; most themes just use the genaric wrapper which ships with the default ubb, so the option is to either export with the custom wrapper (if you used one) or export without wrapper (which will use the stock wrapper).
And so long as it works for 7.0 it should work with 7.1 (only slight additions have been maded to 7.1, such as the new posts indicators (in red here ont he main page))
