AU plugins not resizing, controls dropping
I'm having a problem with Apple plugins under Mixbus (Mixbus 1.4.1 on MacOS 10.6.5). Certain plugins, such as AUDelay, AUDymanicsProcessor and AUMultibandCompressor have a triangular control at the lower edge of the window marked "Details". Clicking this control should resize the window to display more contents, but that doesn't happen. You can tell that the contents of the windows change, but the lower section is masked off. Resizing the window doesn't let you see it. These plugins work fine under GarageBand.
Also, I lose control of the the dot shaped handles in plugins such as AUHighShelfFilter as I'm dragging them around, which is very frustrating. I reselect, drag again, moving the dot a bit and then lose control. Again, these work fine in Garageband.