Currently Being ModeratedSep 24, 2013 2:30 AM (in response to wforkel)
It seems that apple has reacted to this bug report without notice. Recently I tried it once more with quicktime and an apogee ensemble interface. Surprisingly, the problem did not occur anymore. I have not tested it with iMovie and FCPX yet.
The sad side of Apples support strategy is that I spent time and money searching for a workaround without knowing that Apple had removed the bug in the meantime.