Thank you for the brilliant support, hope to be a help for you, too.
Unfortunately, Dock crashes again. I went to the Grid View, clicked on a Space and BOOM… Here the logs:
Process: Dock [880]
Path: /System/Library/CoreServices/Dock.app/Contents/MacOS/Dock
Identifier: com.apple.dock
Version: 1.8 (1314)
Build Info: Dock-1314000000000000~2
Code Type: X86-64 (Native)
Parent Process: launchd [217]
Responsible: Dock [880]
User ID: 501
Date/Time: 2013-10-09 17:25:51.377 +0200
OS Version: Mac OS X 10.9 (13A598)
Report Version: 11
Anonymous UUID: 191B7A56-C19B-08A2-E7D0-7EE6560E86C5
Sleep/Wake UUID: F01BDBD1-F236-4A99-A5C7-3799A76F2E00
Crashed Thread: 7
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
abort() called
terminating with uncaught exception of type std::__1::system_error: mutex lock failed: Invalid argument
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8ae21a1a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8ae20d18 mach_msg + 64
2 com.apple.CoreFoundation 0x00007fff942b3315 __CFRunLoopServiceMachPort + 181
3 com.apple.CoreFoundation 0x00007fff942b2939 __CFRunLoopRun + 1161
4 com.apple.CoreFoundation 0x00007fff942b2275 CFRunLoopRunSpecific + 309
5 com.apple.dock 0x0000000103afcd73 0x103af7000 + 23923
6 libdyld.dylib 0x00007fff8985a5fd start + 1
Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff8ae26662 kevent64 + 10
1 libdispatch.dylib 0x00007fff894ab43d _dispatch_mgr_invoke + 239
2 libdispatch.dylib 0x00007fff894ab152 _dispatch_mgr_thread + 52
Thread 2:: Dispatch queue: com.apple.root.high-priority
0 libsystem_kernel.dylib 0x00007fff8ae21a1a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8ae20d18 mach_msg + 64
2 liblaunch.dylib 0x00007fff8a7a585a 0x7fff8a7a2000 + 14426
3 liblaunch.dylib 0x00007fff8a7a2ef4 bootstrap_look_up3 + 60
4 liblaunch.dylib 0x00007fff8a7a2fad bootstrap_look_up2 + 40
5 com.apple.CoreGraphics 0x00007fff89865b45 CGSLookupServerRootPort + 123
6 com.apple.CoreGraphics 0x00007fff89865a91 get_session_port + 20
7 com.apple.CoreGraphics 0x00007fff898e37a9 CGWindowListCreateImage + 40
8 com.binaryage.GridZoom 0x000000010491cece -[GridTransition createGridImage:] + 67
9 com.binaryage.GridZoom 0x000000010491e533 -[GridTransition zoomToDesktop:gridWid:animationType:onComplete:] + 356
10 com.binaryage.FastSwitch2 0x0000000107e2a51f -[GridView callUnshowAnimation] + 344
11 com.binaryage.FastSwitch2 0x0000000107e2a28e -[GridView unshow] + 319
12 com.binaryage.FastSwitch2 0x0000000107e163dd -[OverviewGrid unshow] + 246
13 com.binaryage.FastSwitch2 0x0000000107e1405d BaSwizzleReplacement_WVSpaceSwitcher_369 + 110
14 com.apple.dock 0x0000000103d17fa1 0x103af7000 + 2232225
15 libdispatch.dylib 0x00007fff894a92ad _dispatch_client_callout + 8
16 libdispatch.dylib 0x00007fff894ab8a1 _dispatch_source_invoke + 413
17 libdispatch.dylib 0x00007fff894aafa3 _dispatch_root_queue_drain + 75
18 libdispatch.dylib 0x00007fff894ac193 _dispatch_worker_thread2 + 40
19 libsystem_pthread.dylib 0x00007fff947b8ef8 _pthread_wqthread + 314
20 libsystem_pthread.dylib 0x00007fff947bbfb9 start_wqthread + 13
Thread 3:
0 libsystem_kernel.dylib 0x00007fff8ae25e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff947b8f08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff947bbfb9 start_wqthread + 13
Thread 4:
0 libsystem_kernel.dylib 0x00007fff8ae25e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff947b8f08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff947bbfb9 start_wqthread + 13
Thread 5:
0 libsystem_kernel.dylib 0x00007fff8ae25e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff947b8f08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff947bbfb9 start_wqthread + 13
Thread 6:
0 libsystem_kernel.dylib 0x00007fff8ae25716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff947b9c3b _pthread_cond_wait + 727
2 com.apple.dock 0x0000000103b27a9b 0x103af7000 + 199323
3 libsystem_pthread.dylib 0x00007fff947b7899 _pthread_body + 138
4 libsystem_pthread.dylib 0x00007fff947b772a _pthread_start + 137
5 libsystem_pthread.dylib 0x00007fff947bbfc9 thread_start + 13
Thread 7 Crashed:
0 libsystem_kernel.dylib 0x00007fff8ae25866 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff947b835c pthread_kill + 92
2 libsystem_c.dylib 0x00007fff8953abba abort + 125
3 libc++abi.dylib 0x00007fff94eca141 abort_message + 257
4 libc++abi.dylib 0x00007fff94eefaa4 default_terminate_handler() + 240
5 libobjc.A.dylib 0x00007fff93b95322 _objc_terminate() + 124
6 libc++abi.dylib 0x00007fff94eed3e1 std::__terminate(void (*)()) + 8
7 libc++abi.dylib 0x00007fff94eed08b __cxa_rethrow + 109
8 libobjc.A.dylib 0x00007fff93b95049 objc_exception_rethrow + 40
9 com.apple.CoreFoundation 0x00007fff942b2308 CFRunLoopRunSpecific + 456
10 com.apple.Foundation 0x00007fff8b9e0889 -[NSConnection run] + 127
11 com.apple.Foundation 0x00007fff8b96770b NSThread__main + 1318
12 libsystem_pthread.dylib 0x00007fff947b7899 _pthread_body + 138
13 libsystem_pthread.dylib 0x00007fff947b772a _pthread_start + 137
14 libsystem_pthread.dylib 0x00007fff947bbfc9 thread_start + 13
Thread 7 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x00000001079d2000 rcx: 0x00000001079d15d8 rdx: 0x0000000000000000
rdi: 0x000000000000f803 rsi: 0x0000000000000006 rbp: 0x00000001079d1600 rsp: 0x00000001079d15d8
r8: 0x00007fff94ef0a87 r9: 0x00007fff89562900 r10: 0x0000000008000000 r11: 0x0000000000000206
r12: 0x00000001079d1760 r13: 0x00007fff7add4eb0 r14: 0x0000000000000006 r15: 0x00000001079d1640
rip: 0x00007fff8ae25866 rfl: 0x0000000000000206 cr2: 0x0000000103d67000
Logical CPU: 0
Error Code: 0x02000148
Trap Number: 133