There's been some recent discussion in the PHPNuke camp about security issues with it as well.

-drmike

Quoting ben wiseley wiseleyb@gmail.com:

Most of these sites use some version of http://www.htmlarea.com/ - which is pretty good but definitely not ready for shrink wrapping yet.... which is mostly browser differences (making something like this next to impossible to get perfect). I've worked with their code a lot, it's pretty good but, until browsers come up with a standard I doubt it'll ever be 100% solid.