MAC crashes when exporting from iMovie

[msmcgahhey]

I produce video for a football team and we have 2 G5's that we use for non-linear editing. Each is hooked to a 4x4 switcher and DV converter which is hooked to a monitor, DVD recorder, and VCR. We have constant problems exporting video from the Mac to the VCR or anywhere but a hand-held MiniDV camera via FireWire. I had the system working again last week but now I'm having a problem exporting again. The crash report mentions Quicktime Audio and Apple Audio but I am a little out of my league beyond simply reading the report. Looking for some help.

Date/Time: 2007-03-23 13:03:42 -0700
OS Version: 10.3.9 (Build 7W98)
Report Version: 2

Command: iMovie HD
Path: /Applications/iMovie HD.app/Contents/MacOS/iMovie HD
Version: 6.0.3 (6.0.3)
PID: 475
Thread: 11

Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0xff000000

Thread 11 Crashed:
0 <<00000000>> 0xff000000 0 + 0xff000000
1 ...ickTimeComponents.component 0x932cf9e4 _ZN43AudioContextDeferredInterruptTaskEventQueue9PreRenderEmRK14AudioTimeStampmmRK15AudioB ufferList + 0x264
2 ...ickTimeComponents.component 0x932cde08 _ZN33AudioContextDeferredInterruptTask6RenderEmRK14AudioTimeStampmmRK15AudioBufferList + 0x28
3 ...ickTimeComponents.component 0x932cdf40 _ZN40AudioContextDeferredInterruptTaskManager27DeferredInterruptTaskHelperEPvPmPK14AudioTi meStampmmP15AudioBufferList + 0x30
4 ...pple.audio.units.Components 0x9188897c DefaultOutputAUEntry + 0x7180
5 ...pple.audio.units.Components 0x91884d88 DefaultOutputAUEntry + 0x358c
6 ...pple.audio.units.Components 0x9191aa54 0x91880000 + 0x9aa54
7 ...ple.CoreServices.CarbonCore 0x962e6e50 CallComponent + 0x10c
8 ...ple.CoreServices.CarbonCore 0x962e6e50 CallComponent + 0x10c
9 ...apple.audio.units.AudioUnit 0x93fcccc4 AudioUnitRender + 0x38
10 ...ickTimeFireWireDV.component 0x84bca90c AudioOutputProc + 0x9c
11 ...ple.CoreServices.CarbonCore 0x963245d0 TimerThread + 0x11c
12 libSystem.B.dylib 0x90024990 _pthread_body + 0x28