I am using B4 version 1.1 under WIndowsXPsp2 with the extra Tonewheels and when selecting a tonewheel while playing a note at the same time it locks up Live 4.1. When Live locks up my whole system is not responding.
This can be reproduced anytime. Just play a note on the B4 and select a different tonewheel-preset and bang: system locks up!
Please also add a restriction to Live so it can never use more than like 80% of CPU power. Something like done in Reason. This works fantastic since it can never bring your system down, only the application will stop and shows a warning.