Per bug 12056, *some* systems appear to have bad interactions with the
new preprocessor, leaving strip markers in place of <nowiki>, <ref>, etc
on page edit.
Neither Tim nor I could reproduce it on our test systems... I tried
switching the new code in briefly on the live system, but alas found
that at least some portion of our production servers are showing it.
Will do some further investigation on this; might be interaction with
another extension, or order of operations, or a weird config issue... Bleah!
Another note -- I found that *something* on the live site is triggering
very deeply nested function calls in the proprocessor expansion, which
triggers the 100-stack-frame-deep recursion bailout in Xdebug which is
running on one box for diagnostic purposes.
Stack trace:
http://wikitech.leuksman.com/view/Preprocessor_stack_trace
-- brion vibber (brion @
wikimedia.org)