rowan.collins wrote:

The code {{prettytable}} just means "insert the contents of the page
[[Template:Prettytable]] here", so if you haven't created such a template, it
should have no effect. See [[meta:Help:Template]]; I've re-worded the section of
[[meta:Help:Table]] that refers to this to hopefully make clearer that this is
not some built-in part of the software, just an example of a useful trick.

Meanwhile, using the non-existent template in the middle of the table syntax
appears to have confused the parser somewhat, hence the extra ">". That could be
considered a bug, but it's not something that ever *needs* to work, and solving
it is likely to create more serious problems.

This creates invalid markup, from the link replacement borking:
<table <!-- -->>

New HTML sanitizer in 1.5 handles this correctly: http://test.leuksman.com/index.php/2050

Resolving as FIXED.