I do not really know what happened but after updating my Opera, everything suddenly went bigger. The title bar, texts, pages, my speeddial thumbnails, everything got bigger. I tried checking zoom and it was already at 100% zoom but it looks like the pages are zoomed by 125%. I've been using Opera for quite some time and it's only today that I seemed to have encountered this problem. I also went to settings to check my font size settings and it was already set to medium

I'm using Windows 8 btw.