Translation problem

Hi,
I am using localizer modue and at first everything seemed to be working fine.
At one point I started having some problems which seem to be addressed to the modifications required to the taxonomy module in order to localizer to work. (as You can tell I'm not much of an expert)

For instance, when trying to create a new translation, I get the following warning:

Illegal offset type in /var/www/vhosts/mysite.com/httpdocs/test/modules/taxonomy/taxonomy.module

(I get a similar error when a creating a product using image attach to disply the image)

Furthermore, the taxonomy localizer is not working any more, as I get both language versions of the same content displayed in one single taxonomy term.

Has anyone run across a similar problem?
thanks in advance