After editing php.ini ( http://simpleinvoices.org/forum/topic.php?id=299 ) I can now at least generate something that looks like a pdf. But the lines with the products are totally missing. And when I load/view/modify a page with clients/bilers/products/invoice preferences, Simple Invoices returns a blank page - only with the menu on top. As in the previous topic I reinstalled SI on a few of different domains, tested with the old database, with a new blank one, with the default path, etc so it's not about corrupted files. Just not working.
Did it! It was no use in tracking down the problem... I just reinstalled/udated/recompiled on my server most of the packages, including Apache and PHP. Stripped down my CentOS to the bone! SI seems to be working fine so far. So my apologise for wasting your time, but I thought that someone could help me without wasting weeks. And in the process I made o complete translation in romanian > http://simpleinvoices.org/forum/topic.php?id=317 8)
PS: if I'll make a new template for SI, personalized to the romanian needs, can I submitt it to you?