I'm not sure it is a bug but it looks like it. Whenever i adjust the tempo and speed on a playing pattern, the tempo display does not refresh until i stop/start the pattern again and it usually fixes it but sometimes the speed/tempo resets.
This is on the august 12 build under mac os x.
Schism tracker = fun
heya :)
Are you just using the Txx / Axx commands? They work fine for me in Linux. So does shift/ctrl { and }.