Took me a while to figure out that this only occurs in Firefox while viewing a regular post that contains a wiki link. It doesn't happen in wiki pages or comments which is why I was unable to reproduce earlier. I'm not sure if there are new CSS rules in XenForo 1.4 that contribute to this, but a style property of word-wrap: break-word has been added to the body tag, which means that any line in the document can break words in half if it can't all fit on the line.
Fixed in the next release. In
vault/resources/js/preview.js, find:
Code:
this.area.setStyle("display", "inline-block");
Add after:
Code:
this.area.setStyle("wordWrap", "initial");
Also wanted to let you know that Firefox 32 is the current version. Firefox 14 was released over 2 years ago and every time I open it, it complains really hard about not being up-to-date. From what I can see, you might have Firefox 16 as your highest possible version if you use MacOS X 10.5. In this case, Mozilla highly suggests upgrading the OS, since it Apple retired it as EOL back in 2009. IIRC from a friend's Mac, you can now update to 10.9 for free. I don't think vaultwiki.org even works on older Macs because the fixes for Heartbleed in April were not compatible with Apple products in general, let alone unsupported Apple products.
From what I understand, even under Windows XP, which shouldn't be able to open vaultwiki.org due to Heartbleed fixes that aren't available in Windows XP (it was conveniently EOL the same month as Heartbleed), the most recent Firefox version is 32.
So if your version is 14, and it's telling you the browser is up-to-date, something is wrong.