DVD Studio Pro 4 crashes every time I try to import

Question

Everything has been working smoothly for many, many video projects until last night:
-finish the edit in FCP7
-send to Compressor
-convert to .ac3 audio and .m2v video files in Best DVD 90 min option
-open DVDSP4 project
-import ,m2v video file as asset is no problem
-as soon as I click on the .ac3 audio file in the import window, DVDSP crashes with a massive error message.
I redid the workflow using little changes like different FCP project sequence to send to Compressor, different DVDSP project, different folder in Finder, and even tried Best DVD 120 min setting in Compressor... all have same result of an instant DVDSP crash when I try to import the .ac3 audio file.
Any thoughts?
The error message is super long, but here is the start:
=============
Process:         DVD Studio Pro [290]
Path:            /Applications/DVD Studio Pro.app/Contents/MacOS/DVD Studio Pro
Identifier:      com.apple.dvdstudiopro
Version:         4.2.2 (431.40)
Build Info:      DSP-4315400~54
Code Type:       X86 (Native)
Parent Process:  launchd [114]
Date/Time:       2011-04-29 06:25:13.090 -0500
OS Version:      Mac OS X 10.6.7 (10J869)
Report Version:  6
Interval Since Last Report:          149946 sec
Crashes Since Last Report:           15
Per-App Interval Since Last Report:  32261 sec
Per-App Crashes Since Last Report:   15
Anonymous UUID:                      5CA8E333-B21D-4A79-A64D-504C20758544
Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000261
Crashed Thread:  0  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.QuickTime               0x97d540ef PrivateQTGetMoviePlayabilityState_priv + 62
1   com.apple.QuickTime               0x97d540a1 QTGetMoviePlayabilityState_priv + 33
2   ...ickTimeComponents.component    0x94edf8bc internalDoAction + 9849
3   ...ickTimeComponents.component    0x94ecebdc _MCIdle + 61
4   ...ple.CoreServices.CarbonCore    0x969cc014 CallComponentFunctionCommonWithStorage(char**, ComponentParameters*, long (*)(), unsigned long) + 54

Answer 1

After a cup of coffee this morning I thought of the obvious: the audio in FCP was corrupt for some reason so I made an AIFF version of the audio, replaced the old audio, and then sent to Compressor.  Everything has worked fine and I have imported into DVDSP with no problem. 
Sorry for the slow thought process.
Thank you coffee.