It's been reported to me that some URLs which contain commas are not displaying as proper links on my site. I've just done a test on this site and received the same result. Here's an example:
If I create a link using the toolbar, then this URL works fine:
The issue is not consistent. Only some pages with commas don't work, not all. Here's one that does work:
So far, the only reports I've received are about wikipedia pages. Could there be a conflict in links that have both apostrophes and commas?