[TYPO3-ttnews] After update to 2.5.2 relatedbycategory doesn't work

[Michael Janssen]

Hi,

some mysteriously things are going on. Tonight i updated an installation 
from 2.5.0 to 2.5.2. And now the relatedbycategory doesn't really work. 
(Before the update it work's perfect!).

Most of the article have the message: No news found. But some articles 
have 1 article from the same category. I cannot find any logic behind 
the showed news.

Does anybody know this problem?

Please help,

Michael