Ok, I solved it myself. I don’t know if it is mentioned somewhere, but the layout doesn’t work properly if you only have one entry. So before you freakout and wonder why your entry isn’t showing up, make sure you have enough entries posted. Silly mistake and is most likely to happen if your blog is still new.
Ok, managed to get the mainpage working again. Apparently, if you only have one entry to display, which was the case, since my blog is new, it simply won’t show up.:/
Still having problems with the category page, though.
