Here's a crash report, from vice-macosx-cocoa-i386+x86_64-10.6-clang-2.2.1-r22310_20100221_trunk.dmg
Happens everytime, immediately after starting up x64 in 32-bit mode. Deleting org.viceteam.x64* prefs makes no difference.
Runs fine in 64-bit mode. GCC 4.2 build does not have this problem.
Process:         x64 [20399]
Path:            /Users/sid/Desktop/x64.app/Contents/MacOS/x64
Identifier:      org.viceteam.x64
Version:         ??? (2.2.1-r22310_20100221_trunk)
Code Type:       X86 (Native)
Parent Process:  launchd [177]
Date/Time:       2010-03-04 20:59:11.810 +0100
OS Version:      Mac OS X 10.6.2 (10C540)
Report Version:  6
Interval Since Last Report:          227587 sec
Crashes Since Last Report:           7
Per-App Interval Since Last Report:  4 sec
Per-App Crashes Since Last Report:   2
Anonymous UUID:                      01394610-8F45-459B-9C29-22778B7FA11D
Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread:  3
Thread 0:  Dispatch queue: com.apple.main-thread
0   libSystem.B.dylib             	0x984808da mach_msg_trap + 10
1   libSystem.B.dylib             	0x98481047 mach_msg + 68
2   com.apple.CoreFoundation      	0x916a277f __CFRunLoopRun + 2079
3   com.apple.CoreFoundation      	0x916a1864 CFRunLoopRunSpecific + 452
4   com.apple.CoreFoundation      	0x916a1691 CFRunLoopRunInMode + 97
5   com.apple.Foundation          	0x9356d84a -[NSConnection sendInvocation:internal:] + 2587
6   com.apple.Foundation          	0x9356cca9 -[NSDistantObject forwardInvocation:] + 411
7   com.apple.CoreFoundation      	0x916dfe54 ___forwarding___ + 1108
8   com.apple.CoreFoundation      	0x916df982 _CF_forwarding_prep_0 + 50
9   org.viceteam.x64              	0x000dee24 0x1000 + 908836
10  org.viceteam.x64              	0x000dee64 0x1000 + 908900
11  org.viceteam.x64              	0x000cf525 0x1000 + 845093
12  org.viceteam.x64              	0x000cc02d 0x1000 + 831533
13  org.viceteam.x64              	0x000cec33 0x1000 + 842803
14  com.apple.Foundation          	0x935141c7 _nsnote_callback + 176
15  com.apple.CoreFoundation      	0x916c09a9 __CFXNotificationPost + 905
16  com.apple.CoreFoundation      	0x916c03da _CFXNotificationPostNotification + 186
17  com.apple.Foundation          	0x93509094 -[NSNotificationCenter postNotificationName:object:userInfo:] + 128
18  org.viceteam.x64              	0x000dfaa3 0x1000 + 912035
19  com.apple.Foundation          	0x9352ade1 __NSThreadPerformPerform + 506
20  com.apple.CoreFoundation      	0x916a4761 __CFRunLoopDoSources0 + 1201
21  com.apple.CoreFoundation      	0x916a238f __CFRunLoopRun + 1071
22  com.apple.CoreFoundation      	0x916a1864 CFRunLoopRunSpecific + 452
23  com.apple.CoreFoundation      	0x916a1691 CFRunLoopRunInMode + 97
24  com.apple.HIToolbox           	0x90239f0c RunCurrentEventLoopInMode + 392
25  com.apple.HIToolbox           	0x90239cc3 ReceiveNextEventCommon + 354
26  com.apple.HIToolbox           	0x90239b48 BlockUntilNextEventMatchingListInMode + 81
27  com.apple.AppKit              	0x9787cac5 _DPSNextEvent + 847
28  com.apple.AppKit              	0x9787c306 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 156
29  com.apple.AppKit              	0x9783e49f -[NSApplication run] + 821
30  org.viceteam.x64              	0x000de7fd 0x1000 + 907261
31  org.viceteam.x64              	0x000dd67b 0x1000 + 902779
32  org.viceteam.x64              	0x00002e95 0x1000 + 7829
Thread 1:  Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib             	0x984a70ea kevent + 10
1   libSystem.B.dylib             	0x984a7804 _dispatch_mgr_invoke + 215
2   libSystem.B.dylib             	0x984a6cc3 _dispatch_queue_invoke + 163
3   libSystem.B.dylib             	0x984a6a68 _dispatch_worker_thread2 + 234
4   libSystem.B.dylib             	0x984a64f1 _pthread_wqthread + 390
5   libSystem.B.dylib             	0x984a6336 start_wqthread + 30
Thread 2:
0   libSystem.B.dylib             	0x984a6182 __workq_kernreturn + 10
1   libSystem.B.dylib             	0x984a6718 _pthread_wqthread + 941
2   libSystem.B.dylib             	0x984a6336 start_wqthread + 30
Thread 3 Crashed:
0   org.viceteam.x64              	0x000fded9 SIDFP::clock_resample_interpolate(int&, short*, int, int) + 1145
1   org.viceteam.x64              	0x000fd1a9 void interpolate<int (*) [2], PointPlotter<int> >(int (*) [2], int (*) [2], PointPlotter<int>, double) + 5721
2   org.viceteam.x64              	0x0007b652 0x1000 + 501330
3   org.viceteam.x64              	0x0007a756 0x1000 + 497494
4   org.viceteam.x64              	0x00038592 0x1000 + 226706
5   org.viceteam.x64              	0x0001becd 0x1000 + 110285
6   org.viceteam.x64              	0x0001bb54 0x1000 + 109396
7   org.viceteam.x64              	0x0001c9ad 0x1000 + 113069
8   org.viceteam.x64              	0x0001c3cc 0x1000 + 111564
9   org.viceteam.x64              	0x0001f2df 0x1000 + 123615
10  org.viceteam.x64              	0x000bc0c4 0x1000 + 766148
11  org.viceteam.x64              	0x0002afa1 0x1000 + 171937
12  org.viceteam.x64              	0x00013d3e 0x1000 + 77118
13  org.viceteam.x64              	0x000e04d8 0x1000 + 914648
14  org.viceteam.x64              	0x000e0311 0x1000 + 914193
15  com.apple.Foundation          	0x935148d8 -[NSThread main] + 45
16  com.apple.Foundation          	0x93514888 __NSThread__main__ + 1499
17  libSystem.B.dylib             	0x984adfbd _pthread_start + 345
18  libSystem.B.dylib             	0x984ade42 thread_start + 34
Thread 4:
0   libSystem.B.dylib             	0x984808da mach_msg_trap + 10
1   libSystem.B.dylib             	0x98481047 mach_msg + 68
2   com.apple.opengl              	0x95b2cedb glcDebugListener + 426
3   libSystem.B.dylib             	0x984adfbd _pthread_start + 345
4   libSystem.B.dylib             	0x984ade42 thread_start + 34
Thread 5:
0   libSystem.B.dylib             	0x9848093a semaphore_timedwait_signal_trap + 10
1   libSystem.B.dylib             	0x984ae445 _pthread_cond_wait + 1066
2   libSystem.B.dylib             	0x984dd028 pthread_cond_timedwait_relative_np + 47
3   com.apple.CoreVideo           	0x98dc115e CVDisplayLink::waitUntil(unsigned long long) + 386
4   com.apple.CoreVideo           	0x98dbffd7 CVDisplayLink::runIOThread() + 747
5   com.apple.CoreVideo           	0x98dbfcd0 startIOThread(void*) + 156
6   libSystem.B.dylib             	0x984adfbd _pthread_start + 345
7   libSystem.B.dylib             	0x984ade42 thread_start + 34
Thread 6:
0   libSystem.B.dylib             	0x984a6182 __workq_kernreturn + 10
1   libSystem.B.dylib             	0x984a6718 _pthread_wqthread + 941
2   libSystem.B.dylib             	0x984a6336 start_wqthread + 30
Thread 7:
0   libSystem.B.dylib             	0x9848093a semaphore_timedwait_signal_trap + 10
1   libSystem.B.dylib             	0x984ae445 _pthread_cond_wait + 1066
2   libSystem.B.dylib             	0x984dd028 pthread_cond_timedwait_relative_np + 47
3   com.apple.audio.CoreAudio     	0x9189c965 CAGuard::WaitFor(unsigned long long) + 219
4   com.apple.audio.CoreAudio     	0x9189f997 CAGuard::WaitUntil(unsigned long long) + 289
5   com.apple.audio.CoreAudio     	0x9189d294 HP_IOThread::WorkLoop() + 1892
6   com.apple.audio.CoreAudio     	0x9189cb2b HP_IOThread::ThreadEntry(HP_IOThread*) + 17
7   com.apple.audio.CoreAudio     	0x9189ca42 CAPThread::Entry(CAPThread*) + 140
8   libSystem.B.dylib             	0x984adfbd _pthread_start + 345
9   libSystem.B.dylib             	0x984ade42 thread_start + 34
Thread 3 crashed with X86 Thread State (32-bit):
  eax: 0x00000001  ebx: 0x00791fd0  ecx: 0x007748c8  edx: 0xa0b488c0
  edi: 0x00774830  esi: 0x00000001  ebp: 0xb018d948  esp: 0xb018d8f0
   ss: 0x0000001f  efl: 0x00210286  eip: 0x000fded9   cs: 0x00000017
   ds: 0x0000001f   es: 0x0000001f   fs: 0x0000001f   gs: 0x00000037
  cr2: 0x00000000