Crazy amount of disk access

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open a file
2.
3.

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
0.6.8

Please provide any additional information below.
when playing a file from my external disk it goes crazy trying to keep up with 
movist..

Original issue reported on code.google.com by jamiemar...@hotmail.com on 28 Aug 2010 at 6:18