This is from the official Apple TIL (
http://developer.apple.com/technotes/tn/tn1194.html )describing the update:
" COMPATIBILITY NOTE
CarbonLib�1.0.2, which is not part of Mac�OS�9.0.4 but is installed with AppleWorks�6, introduces a change to the way the Event Manager handles Apple event idleProcs. The result is that using Script�Editor�1.4.1 with CarbonLib�1.0.2 will result in substantial delays in Apple event processing. Script�Editor�1.4.3 and later fixes this problem."
[This message has been edited by oscar (edited 04-05-2000).]