This happened to me while playing DTV EU. I wasn't doing anything special.
[02:56:28] Starting map village_31 in mode multiplayer_dtv
[03:00:03] ERROR: Incorrect skeleton type for anim 553
[03:00:03] Dumping call stack...
[03:00:03] - 0x74D1B9BC KERNELBASE.dll+0xB9BC (RaiseException+0x58)
[03:00:03] - 0x0119FFAE crpg_beta.exe+0x5AFFAE (rglCrashLogger::log+0x5E)
[03:00:03] - 0x01204689 crpg_beta.exe+0x614689 (rglError+0xC9)
[03:00:03] - 0x00FFAA45 crpg_beta.exe+0x40AA45 (mbAgent::updateAction+0x5B5)
[03:00:03] - 0x00FF45A5 crpg_beta.exe+0x4045A5 (mbAgent::postFrameMove+0x25)
[03:00:03] - 0x010A519E crpg_beta.exe+0x4B519E (mbMission::frameMove+0x91E)
[03:00:03] - 0x0113C911 crpg_beta.exe+0x54C911 (mbTacticalWindow::frameMove+0x861)
[03:00:03] - 0x0103FB2E crpg_beta.exe+0x44FB2E (mbCoreGame::frameMove+0xEE)
[03:00:03] - 0x010479AE crpg_beta.exe+0x4579AE (CD3DApplication::Render3DEnvironment+0x4AE)
[03:00:03] - 0x0104844C crpg_beta.exe+0x45844C (CD3DApplication::Run+0xEC)
[03:00:03] - 0x0118AB7F crpg_beta.exe+0x59AB7F (WinMain+0x16FF)
[03:00:03] - 0x013126D1 crpg_beta.exe+0x7226D1 (__tmainCRTStartup+0xFD)
[03:00:03] - 0x761A339A kernel32.dll+0x1339A (BaseThreadInitThunk+0x12)
[03:00:03] - 0x76F69EF2 ntdll.dll+0x39EF2 (RtlInitializeExceptionChain+0x63)
[03:00:03] - 0x76F69EC5 ntdll.dll+0x39EC5 (RtlInitializeExceptionChain+0x36)
[03:00:03] - 0x013125C9 crpg_beta.exe+0x7225C9 (ftell+0x67)
[03:00:03] - 0x013125C9 crpg_beta.exe+0x7225C9 (ftell+0x67)
[03:00:03] Dumping memory status...
[03:00:03] Commit size: 808 MB
[03:00:03] Working set size: 690 MB
[03:00:03] Available size: 5157 MB
[03:00:03] Heap #0 (process): 387 MB
[03:00:03] Heap #1: 5 MB
[03:00:03] Heap #2: 0 MB
[03:00:03] Heap #3: 3 MB
[03:00:03] Heap #4: 148 MB
[03:00:03] Heap #5: 0 MB
[03:00:03] Heap #6: 41 MB
[03:00:03] Heap #7: 0 MB
[03:00:03] Heap #8: 0 MB
[03:00:03] Heap #9: 0 MB
[03:00:03] Heap #10: 0 MB
[03:00:03] Heap #11: 0 MB
[03:00:03] Heap #12: 0 MB
[03:00:03] Closing log file...