When the tabs are empty, nothing will be generated. Previously the chrome (borders, etc) would be generated giving a really bad display
More fixes for edge cases with BBCode. People were using this with crazy combinations of color, size, and unbalanced (invalid) tags in top of that. The add-on no longer breaks when it hits those edge cases
The <ul> and <li> inside the tabs had their bullets or numbers removed by css inheritance. This has been corrected.