error in the dev version(feb 23) - visible to anons

weird: i have put this on another site, which is still under construction, and it works perfectly... this site uses the itheme, while the first one runs a modified version of the bluemarine theme.

Update: i don't what was the problem but copying the files from one site to the other fixed the problem...

Update2: The only difference between the two setups was that i had the mark as read module on the first one, i am not seeing the link between the errors and this, but that's all...

PS: I know i shouldn't be using the devs version but some testing on my machine along with making backups of the sites keep me safe from falling on the wrong end...

Final Update: i am not sure, but the problems may have been caused by my webhost, not only am i getting this error on the first site, but i am also getting database errors(cannot connect to database server...). i don't know if it is a fluke but you might want to have a look at that line...

Another Update: it seems that it takes sometime before the problem stomps the site, so i guess that this bug is kind of confirmed....

Excuse me, but how can i have the dev version posted on february 9th, because i lost it and this version contains noticeable enhancement from the alpha2 version, maybe you can post it as an alpha3 version until you have backported the changes form the drupal 6 version, thanks in advance...