Is it my browser? or is Codeforces having a font size problem? My name in my profile page is weirdly large. When I open a problem, the right part (virtual contest and tags) also has a very large font size, is it a problem because of my browser (I'm using Maxthon)? or is everyone else having the same problem? here's a picture of how I see the problem page: 
It also happens for me occasionally (Chromium, Win7), but only recently. Something changed.
Try to clear the browser cache.
I had this bug, but after clearing the cache it started to display normally.
That did the trick. Thanks a lot!
Any way to fix it?
Yup the previous comment was really useful, try deleting the browsers cache, it worked for me.
I deleted cache. Still facing problem. I am using google chrome btw.
I wish I could help. It worked perfectly for me.
Try to reload the page with Ctrl+R or Ctrl+F5.
Thanks Mike. It worked.