Template:Edit glitch warning

From WhyNotWiki

Warning: MediaWiki seems to have a glitch where it sometimes causes two copies of the section you just edited to be inserted or it just loses entire sections for no reason. This seems to only happen (I think) for large pages and only when I click the Edit link for a section — so if you edit this page, please edit the whole page — don't edit a section. (If it makes it any easier, you can always use an external text editor.)