By disabling thread preview in options, the preview is not disabled on front page.
Cannot say if this is a bug or feature so i'll mention it here
But good job in general.
Updating functions and looks of forum line by line.
I also admire the non big bang approach to forum upgrade/cosmetics.
Today those kind of approaches are common, and tend to drive people away due to major interface/GUI change or API change in case of some kind of service.
Hope that helps
Regards
Peasant.