[TYPO3-english] Some pages won't load, but if I change the content they will???

[Morten Kjems]

Hi.

I have a problem with one of my sites. Recently some pages do not load 
correctly.

One day they load just fine and the next day they wont load. Just a 
blank page with empty header and body tag and no error message.

If I change the content they load correctly again.

It seems to happen with all pages at random. A page can be fine a day, a 
week or a month and then all of a sudden it won't load?

I just upgraded to the latest Typo3 and CoolURI version but it had no 
effect.

Any suggestions on how to solve this problem?

Thanks