I ran a real tournament using 2.6 and ran in to a few issues (actually, I used 2.6 alongside my main computer running the tourney)
Off the controls tab, I can save the progress of my tournament, but when I checked auto save, I received a "do you want to keep running scripts on this page" error. Clicking yes brought up the same dialog box, clicking no froze TD2's clock and I could not restart the clock.
And on the layouts tab, I created a cell and inserted the <evenchop> token...I love this. When I create a property set for this cell and set conditions for it, the cell does not display. I created a property set and named it 20 players and set the conditions under Players remaining to <21. It didn't display. I set it to <90 (my starting number of entries) with same results)