An automated run of parserTests.php showed the following failures:
Running test BUG 361: URL within URL, not bracketed... FAILED!
Running test Bug 2702: Mismatched <i> and <a> tags are invalid... FAILED!
Running test A table with no data.... FAILED!
Running test A table with nothing but a caption... FAILED!
Running test Link containing "#<" and "#>" % as a hex
sequences... FAILED!
Running test Template with thumb image (wiht link in description)... FAILED!
Running test Link to image page... FAILED!
Running test BUG 1887: A ISBN with a thumbnail... FAILED!
Running test BUG 1887: A <math> with a thumbnail... FAILED!
Running test BUG 561: {{/Subpage}}... FAILED!
Running test Simple category... FAILED!
Running test Section headings with TOC... FAILED!
Running test Media link with nasty text... FAILED!
Running test Bug 2095: link with pipe and three closing brackets... FAILED!
Running test Sanitizer: Validating the contents of the id attribute (bug 4515)... FAILED!
Passed 270 of 285 tests (94.74%) FAILED!