whats wrong?

whats wrong and why does this happend?? "stream 20:data will arrive too late. Current SCR : 3333..." and at the end of the log: "Bufferunder-runs detected." help plz...

Ive had a few of those, when I left out the subtitles all was good. A bug with ifoedit 0.95 perhaps?

Subtitles disappear 

In the middle of the movie, subtitles start to show very fast for a second, then disappear. It looks that is something about the data arrive too late message in the log window. When ifoedit was making the .VOB files, at 50% of the process the message appears, and at 50% of the movie the subtitles goes off. Is there any fix for this ?