Mac OSX10.6.7/U-mix44/Cross 1.5.2 glitch

Just discovered a glitch/bug in the preferences.
I just came back home, so i fired up Cross to have some fun.
But very strangely the TC-latency was immense (ca. 1-2 second) though it was set to 1,3ms/48KHz within Cross´s preferences.
So i quit Cross and rebooted, same problem, but when i changed the samplerate to 44,1KHz and back to 48KHz the latency-issue was gone.
I really have no idea what happened.
I just came back home, so i fired up Cross to have some fun.
But very strangely the TC-latency was immense (ca. 1-2 second) though it was set to 1,3ms/48KHz within Cross´s preferences.
So i quit Cross and rebooted, same problem, but when i changed the samplerate to 44,1KHz and back to 48KHz the latency-issue was gone.
I really have no idea what happened.