Hi Marty.. I've managed to replicate your crash with Nebulosity 3.2.2.
Looking at the exception report.. there's a segment violation within Nebulosity and the Objective-C runtime library. Thankfully not my drivers
(unless it's a call in that's not supported) I've passed this on to Craig.
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x93b020a7 objc_msgSend + 23
1 com.StarkLabs.nebulosity 0x0063c4ba 0x1000 + 6534330
2 com.StarkLabs.nebulosity 0x0063c838 0x1000 + 6535224
3 com.StarkLabs.nebulosity 0x0014a81f 0x1000 + 1349663
4 com.StarkLabs.nebulosity 0x00028b27 0x1000 + 162599
5 com.StarkLabs.nebulosity 0x00556dc7 0x1000 + 5594567
6 com.StarkLabs.nebulosity 0x00556e17 0x1000 + 5594647
7 com.StarkLabs.nebulosity 0x00663ea6 0x1000 + 6696614
8 com.StarkLabs.nebulosity 0x0066528f 0x1000 + 6701711
9 com.StarkLabs.nebulosity 0x00665381 0x1000 + 6701953
10 com.StarkLabs.nebulosity 0x00665239 0x1000 + 6701625
11 com.StarkLabs.nebulosity 0x008a6f58 0x1000 + 9068376
12 com.StarkLabs.nebulosity 0x006652b6 0x1000 + 6701750
13 com.StarkLabs.nebulosity 0x008a6f58 0x1000 + 9068376
14 com.StarkLabs.nebulosity 0x006652b6 0x1000 + 6701750
15 com.StarkLabs.nebulosity 0x008a6f58 0x1000 + 9068376
16 com.StarkLabs.nebulosity 0x006652b6 0x1000 + 6701750
17 com.StarkLabs.nebulosity 0x00665652 0x1000 + 6702674
18 com.StarkLabs.nebulosity 0x0089fc5b 0x1000 + 9038939
19 com.StarkLabs.nebulosity 0x007d71e3 0x1000 + 8217059
20 com.StarkLabs.nebulosity 0x00724ef3 0x1000 + 7487219
21 com.StarkLabs.nebulosity 0x007aa4f7 0x1000 + 8033527
22 com.StarkLabs.nebulosity 0x007a8a04 0x1000 + 8026628
23 libobjc.A.dylib 0x93b09853 -[NSObject performSelector:withObject:] + 70
I may suggest a check for the selector presence before attempting to call - just in case..