User blog comment:DaNASCAT/Technical Update: November 4, 2014/@comment-4129195-20141104210403/@comment-452-20141108142627

Depends on how you define "glitches".

I know of many issues which have not yet been fixed, here are a couple of favourites off the top of my head:
 * Red links in "deleted" threads appear on WantedPages. (Known to Staff since Jan 2012, this is the oldest I can recall without checking my support ticket history.)
 * All users can access threads which are deleted through the normal interface through their long-form titles.
 * My rename has not been completed and half of my edits/log entries are attributed to my old username, leading to the situation where I have apparently been an admin "forever", as there is no record of my this username ever being promoted.
 * Anon users receive notifications of old-style talk page messages, but not message wall messages.
 * NUMBEROFARTICLES is often inaccurate.

Edit: Also, from Feb 2012, previously existing user talk sub sub pages, such as User_talk:452/subpage/sub-subpage are rendered inaccessible with Message Wall enabled. I've long since moved all these old talk sub pages, but it is still a "glitch" in that they did not anticipate, and have no plans to fix. (I wasn't looking for more examples, but came across this problem again while looking for something else.)