If the only reason you think your software is better is because it's FOSS, you need to write better software
I don't know if it by design or not, but the tooltip appears even when the mouse cursor is not over the title but elsewhere on the same line (shown enclosed in red in the image). I see this behavior using Chrome, Firefox or Opera.
In contrast, here's a link to another forum, also using vBulletin, that limits the appearance of the tooltip to when the mouse cursor is precisely over the title. (I can't tell which version of vBulletin is being used in this case.)
If you write a guide (as an example) offline in a word processor
I often do
I write in code tags
Do the formatting of fonts etc
Previously you could copy this in to the forum, with some minor adjustment
But not now. It gets well mucked up
Did you try the "Paste from Word" button? Paste from Word.png Albeit that I didn't find any difference between using it and not.