Something's borking up entry text every time I edit.

Lately, every time I edit a page I end up causing a bizarre glitch that replaces entry text with garbage. Sometimes it's random strings of number, sometimes it's bits of text from the page source (such as a string specifying the width of the edit box), and sometime it just deletes whole sentences. You can look at my edits on Entertainingly Wrong and Horrible/Film to see what I'm talking about.

I've already tried disabling adblock - no luck. And it's not just doing it on my PC, the same thing happens on my tablet. Do you guys have any idea what might be causing it?

Never seen something akin to this - might be a malware or keyboard issue.