User blog comment:*mynameischrome*/Glitches/@comment-452-20140919153003

Yes, there are a number of glitches which have been around for years. I suggest that you outline each specific one, so that people know what you're talking about.

I'm personally familiar with the page counter glitch.

Although "all pages" are supposed to be counted, with or without commas, adding a comma to a page without one temporarily increases the page count, as does removing all commas from a page.

Once per day, the page count is resynced with the actual page count, (although not at the same time as the special-pages cache update)

Disambiguation pages are also counted towards the page count, and moving them out of the main namespace does not immediately reduce the page count, although it is also later synced. (or something like that, I forget the specifics)

There are also some cases of "ghost pages" counting towards the page count.

Both Special:ShortPages and Special:LongPages are good ways to confirm the exact number of pages on a wiki. (...Unless there are non-main namespaces marked as "content", such as on Community Central. Here, those pages only show 53 pages, although the page count counts all blogs and forums posts.)

One of my personal "favourite" glitches is that redlinks in threads which have been "deleted" using the "delete" menu option still appear on WantedPages, as well as in database dumps, and are generally still accessible if you know the actual page URL. Obviously, deleting threads the "old fashioned" way sidesteps this.