There seem to be issues with the (at least for some newly working) flash support in Konqueror
Blauzahl mentioned she can use flash. Indeed I did! flash 9.0.115 on a 32bit compiled system
For (mutlu_inek) flash also works with minor crashes from time to time, it does automatically restart, though, so no problem. I am using self-compiled trunk, rev. 798847, and adobe's flashplugin 9.0.124 on Arch Linux.
Test site #1: