All formatting destroyed when editing posts in the 'Advanced' page :(

It is happening(at least my case) for a few weeks. I thought it was a browser problem, but changing browsers didn't help.When posting new threads, everything is okay.But whenever I edit something (in the Advanced page), every(except within sentences) whitespace just magically disappears when the page reloads to show the thread.IS it just me or is something wrong ?EDIT: It is even happening(sometimes) in case of new posts...just noticed..never happened before.

There is a bug fix for a similar-sounding issue in vBulletin 4.1.5 (https://www.vbulletin.com/forum/show...load?p=2189097) - I plan to upgrade soon to this version (by the end of the weekend) to see if it helps.

I found that the problem happens only when using linux.
Maybe the parser gets confused by extra/or lack of so whitespace characters ?