Logfile corrupted. Service won't start until logfile is deleted.

Sometimes trying start the service fails (it seems to stop automatically) until the logfile is deleted. The file seems to be corrupt, but I could not determine what's wrong yet.

"Interestingly", notepad.exe displays the logfile as usual, while other tools (e.g. Wordpad, Notepad++) report an error or show an empty file. Eclipse text editor reports "error retrieving content description".

The last entry in the logfile shown by notepad.exe is "[info] Commons Daemon procrun (1.0.10.0 32-bit) started".

The bug is not present in version 1.0.9.