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When ever I try to launch an application that is located on an AFP share, the CPU load raises to max and shortly after that the system locks. Why is this? How can I prevent it?

I'm on current Lion, problem persists since Snow Leopard. The AFP share is on a Synology DiskStation with current firmware.

After the GUI stopped working the windowserver.log reads as following. Every other log file is unchanged until the reboot related log entries. 

Jan 19 19:35:35  [109] kCGErrorIllegalArgument: CGXGetWindowWorkspace: invalid window id: 49
Jan 19 19:35:35  [109] kCGErrorIllegalArgument: CGXGetWindowWorkspace: invalid window id: 3a
Jan 19 19:35:35  [109] kCGErrorIllegalArgument: CGXGetWindowWorkspace: invalid window id: 32

These entries are reproducible. Trying the same through VMware+Lion I experience no crash thus I conclude that there is no problem on server side.

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I read that a Mac often freezes in such cases because it tries to write .DS_store files. What then helped was to excecute defaults write com.apple.desktopservices DSDontWriteNetworkStores true. After that, log out and back in. – gentmatt Jan 20 '12 at 21:22
When this is happening, try running ps auxr | head -6 from the Terminal. Post the output here. It will give us a list of the top 5 CPU processes running at the time. – afragen Jan 22 '12 at 21:20
Can't tell. The hang prevents me even from sshing. – Max Ried Jan 25 '12 at 7:21
You might try leaving an open ssh session before the hang and see if you can use it after the hang. All this on another machine naturally. – afragen Jan 25 '12 at 17:07
The SSH session halts immediately. – Max Ried Jan 29 '12 at 18:01
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