[Typo3] mysql fetch error?

[Samuel Blaas]

>I don't know why but suddenly I get the following error:

>Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result 
>resource in /var/www/realdata/cms/typo3/t3lib/class.t3lib_db.php on line 754

>Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result 
>resource in /var/www/realdata/cms/typo3/t3lib/class.t3lib_db.php on line 754

>I was just working in the backend and everything seemed okay to me. But no I 
>can't see my content anymore? How can I fix this?

>I hope someone can help me quickly. 

Did you already find a soultion for this problem? Beause i'm experiencing the same sudden 'mysql_fetch_row' error in my typo3 installation?