First of all, thank you, @Lemonade and @Red ochre!
I didn't expect that I'd have to download a plugin, because it worked just fine beforehand. I guess there is no easier fix though, so I'll try BoltBaits plugin.
Also @Tactilis, you're completely right I am using a wider font which seems to effect the tab spacing, yet doesn't change the tab font. It's weird but I've grown used to it. (Btw. The font is called "Press Start 2P". I'm a retro enthusiast)