Not sure how I did it, but the Mac console shows:

8/6/12 11:41:37.135 PM MongoHub: startMonitor 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 **************** 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 ERROR: MessagingPort::call() wrong id got:1 expect:acc45dfd 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 toSend op: 7d4 old id:a0000000 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 response msgid:acc45dfc 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 response len: 24 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 response op: 8 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 farEnd: 23.22.61.125:37087 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: Mon Aug 6 23:41:41 Assertion failure false util/message.cpp 467 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 0x10001030e 0x100013ef8 0x100079bc0 0x100087d3b 0x1000a18bd 0x10008ab9d 0x1000a0acb 0x100095336 0x10009d020 0x10002b8be 0x100022d6b 0x7fff919e772a 0x7fff919e76a2 0x7fff8b8cb8bf 0x7fff8b8ceb75 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 0 MongoHub 0x000000010001030e _ZN5mongo12sayDbContextEPKc + 174 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 1 MongoHub 0x0000000100013ef8 _ZN5mongo8assertedEPKcS1_j + 344 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 2 MongoHub 0x0000000100079bc0 _ZN5mongo13MessagingPort4callERNS_7MessageES2_ + 768 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 3 MongoHub 0x0000000100087d3b _ZN5mongo18DBClientConnection4callERNS_7MessageES2_b + 27 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 4 MongoHub 0x00000001000a18bd _ZN5mongo14DBClientCursor4initEv + 301 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 5 MongoHub 0x000000010008ab9d _ZN5mongo12DBClientBase5queryERKSsNS_5QueryEiiPKNS_7BSONObjEii + 1085 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 6 MongoHub 0x00000001000a0acb _ZN5mongo18DBClientConnection5queryERKSsNS_5QueryEiiPKNS_7BSONObjEii + 139 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 7 MongoHub 0x0000000100095336 _ZN5mongo17DBClientInterface7findOneERKSsRKNS_5QueryEPKNS_7BSONObjEi + 118 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 8 MongoHub 0x000000010009d020 _ZN5mongo20DBClientWithCommands10runCommandERKSsRKNS_7BSONObjERS3_i + 160 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 9 MongoHub 0x000000010002b8be -[MongoDB serverStat] + 540 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 10 MongoHub 0x0000000100022d6b -[ConnectionWindowController updateMonitor] + 276 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 11 Foundation 0x00007fff919e772a -[NSThread main] + 68 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 12 Foundation 0x00007fff919e76a2 NSThread__main + 1575 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 13 libsystem_c.dylib 0x00007fff8b8cb8bf _pthread_start + 335 8/6/12 11:41:41.366 PM [0x0-0xb4fb4f].com.thepeppersstudio.MongoHub: 14 libsystem_c.dylib 0x00007fff8b8ceb75 thread_start + 13 8/6/12 11:41:45.098 PM MongoHub: stopMonitor

Process is non responsive. Process sample is attached