It seems that mythtv does not behave nicely when the disk is small.
I have a 80gb disk, and about once a month I get free space related problems.
The backend does not starts-up and the frontend deletes all my preferences (like Playback and OSD configuration).
The problems are caused due to either a huge log file (I had some weird repeating log line "skipping frame" or something) or due to large recording files.
1) How can I limit the size of the log files?
2) How can I configure mythtv to automatically delete old clips when space is needed?