Using FC10, Muse 1.0 RC3 or 0.9-2-FC9, installed from RPM or compiled from source give me the same results. That is the red line indicating the current position cannot be moved unless the song is playing. Neither clicking at the top or using the cursor buttons moves the current location unless the song is playing. This makes editing very tedious and much longer. Copying a segment used to automatically move the current position to the end of that segment. This no longer works either.
I have now experienced this bug on two different systems both using FC10. I never experienced this with FC8 or FC9.