Here's an odd one.
So I started my laptop running Windows 7 today and when I fired up my Firefox got an automatic update to Firefox 29.
Besides figuring out how to deal with the stylistic changes to the new browser (they moved EVERYTHING around!), I also found the following problem.
If I post in any older thread (lets say a couple years old from back in the Huddler days), I write my text and click on "POST" and it looks like nothing happens. The edit box disappears but my post doesn't appear. After numerous duplicate posts, I realized that the posts were actually being made but I needed to refresh the browser page for the new posts to appear.
BTW, if (like me, you are resistant to change) and you want to re-organize your Firefox back to the way it was, you go to "Add-Ons/Extensions" and search for "Classic Theme Restorer." Add this Add-on and you can put things back.