If you are interested, these are two of the bugs that I filed on the subject. I might triage them again sometime, but if you are interested in ensuring that your code hasn't been affected you might want to look at them:
"Do not parse input as wikicode" https://bugs.launchpad.net/zim/+bug/585300
"Option to disable all autolinking" https://bugs.launchpad.net/zim/+bug/585301