On one MSE question, the comments are overlapping the related questions sidebar. Is this something to do with the weird formatting of the first comment?
Mozilla/5.0 (Windows NT 6.0; rv:16.0) Gecko/20100101 Firefox/16.0
Well, since comments won't allow the ordinary
This results in one long stream of characters without any blank space, no different than:
Each browser handles such things in its own way; I don't think there's much to be done.
Just in case, here is the culprit string of characters:
If you run the above through an ASCII converter (this one was built from scratch just now, as I didn't find any decent converter online) you will see there is no blank space but rather a character with ASCII value 822 following each letter.