BUG Tempo track

Found a bug in Cubase 6.02 (mac) in 32 & 64bit

When you are working with different tracks in musical mode (say creating a megamix) with a tempo track every track changing tempo takes up to 54 seconds. The more tracks and the length of the song increases the longer it takes.
A cut in a track and a move takes 30-50 seconds.

http://www.steinberg.net/forum/viewtopic.php?f=19&t=3400