Well, it seems like this whole year of not upgrading the scripts of this website had its costs... The RSS and weather feeds wont display anymore, since there has been a problem in fetching xml files and storing the related information into the database. Unfortunately, even when I tried to change the php function that the system uses to some alternatives, I got the same errors. Seems like I have to backup everything and try a master upgrade or a clean install of the new core. But since this is too risky to carry out, I will stick to the current version...