Thread:Project:Support desk/Certain bodies of text won't save to page

When saving certain bodies of text (clicking save page or show preview) I am redirected to the main page with no warning or error, and the content is not saved, I cannot figure out exactly why this is happening but it isn't reproducible using the sandbox (it looks like it may be due to the difference in editor).

This body of text will cause it no matter what page title I try to save it to:

"Agouti rats have brain-related hormonal activity which aa rats do not. Extra aggression and fear responses are active in agouti rats, which are not in aa rats. The effect is usually relatively mild, but can become greatly enhanced in females raising young, and sometimes once a female becomes reproductively active the enhanced effect does not fade. In most individuals the difference is fairly mild, and despite agouti rats being more aggressive on average, many agouti rats are calmer than many black rats. This is because the A gene is only one of many genetic influences on behaviour, and environment also plays a large role. Don't be put off owning an agouti rat because of the behavioural differences, but it is worth being a little extra careful of bites if you decide to breed agouti females."

MediaWiki: 1.23.1 PHP: 5.3.28 (cgi-fcgi) MySQL: 5.5.36-cll-lve

The site is http://www.ratpedia.org/ and I have given * edit and createpage for testing.