Those with the issue, do me a favour, change your style to "Stock-Style" for me and run it and see if that has the issue.
For those that don't know how to change the style, it's the drop-down box in the bottom right corner of all pages.
It'll be a blue coloured style.
if it does it in that too, I suspect it isn't forum-related but perhaps browser related (version-wise).
So if you do know your browser versions, let me know those too please, let's see if we can get a matching version or something going on.