If you manage to read through this:
http://arstechnica.com/reviews/os/macosx-10.4.ars
you'll find that Tiger's real screen drawing acceleration (Quartz 2D Extreme) isn't even enabled yet!
I wonder how it'll affect Archicad's speed when it is. I'm afraid there's some old Quickdraw code still present in our favorite CAD system...
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1