Issue with xml playlist

[kicker04]

Hi there!

I got a xml playlist containing about 500 videos in different media formats. When I start the playlist everything is fine but after a few minutes (maybe after all files are loaded) some lines are completely white only the duration is left. These videos can still be played but the name is missing. Entering the name once more and saving again doesn't help.

Here's the screenshot: http://i43.tinypic.com/25qgal0.png

greetings
kicker04