Changing sample rate corrupted space designer.... somehow.... HELP!

This is a new one to me, so it's very difficult to explain whats happened. I'll start from the beginning.
I created a new, blank logic file with a sample rate of 96.
I created a new software instrument and began to fill it out, adding some compression, some eq, and a little bit of reverb. The reverb came from space designer, using the small room preset "Thicken Vocals". So far so good. No problems, everything's working fine.
I open Reason to rewire in (and ultimately track and record) some drum samples out of reason. The sound is coming out of reason into an aux bus in Logic, and that aux bus is being used as the input for a new audio track. I lay down some midi notes, play back the drum audio out of Reason and hit record on the audio track, essentially making an audio file of the drum samples coming out of logic.
During this, something happens. Rewire is doing a LOT of work balancing the sync, the sample rate, etc.... and somehow, SOMETHING freaks out in the space designer i was using as some subtle reverb for my software instrument in logic (this software instrument is UNRELATED to the Reason audio).
Now, when i hit play, the space designer just produces a loud, annoying pop. If I CHANGE the space designer preset, everything is cool. If i change it back to "Thicken Vocals" under small rooms.... POP.
Worse, it seems to be a permanent problem.
SO --- Ive done a LOT of trying to figure out whats going on. I create a new document and recreate the software instrument. I browse to Thicken Vocals... POP! I tried to replace the IR that "thicken vocals" is referencing by overwriting the file from a system backup I have (an IR called "0.03s_Room Vocals")... still no dice.
Here's where it gets strange. It works FINE if the sample rate is 44.1... I can browse to "Thicken Vocals" and it loads up and init's fine, and everything is golden. As soon as I go to 96, or load it up when the document is set to 96, that's when it freaks out. NOW, if i adjust the falloff curves of the reverb just enough, THEN it suddenly works again, even under 96k.
So, in a nutshell, at 96k, when I load "thicken vocals"... it almost appears (even according to the waveform Space designer draws) to misread the IR waveform, and it plays back as a POP. If I adjust the Falloff curve, it corrects itself, and the waveform even redraws! At 44.1, there are no problems.
I did NOT have this problem before... does anyone have ANY clue what could be tweaking my system right now? I can post more details if I haven't posted enough... including pictures.
THANKS!!
Chris

You might have a corrupted song file. Possibly your autoload as well. Try trashing logic prefs and rebuilding you autoload. Also, repair permissions and maybe even try updating the prebinding in the terminal. Another possibility could be a conflict with the driver of the Audiowerk8, unlikely, but possible.

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