This is probably no longer a problem for 10 users, but has Graphisoft offered a hotfix for this tedious problem - System is Mac and running Archicad 9 and Plotmaker. Particularly a problem when updating in Plotmaker and this error pops up repeatedly - Have to watch BG Archicad and click -ok- every 20 seconds.
This is one of the reasons many users gave up on linking to the PLN in AC9/PM9. There was no proper fix AFAIK. You are right that it is not a problem in 10. Your best bet is either to publish PMKs (the old fashioned way) or upgrade to AC10. Of course there are lots of other benefits to 10 besides the speed of updating layouts.