How to get Radius tags parsing FBML correctly

I am using the Radius Tag System (from the RadiantCMS) for a content engine in my current applciation. Everything has worked really well, but now I am experiencing issues when using FBML inside my content.

When I supply a tags like the following to my template:

<fb:profile-pic uid="loggedinuser" size="square"></fb:profile-pic> 

Radiant gets confused, incorrectly parsing the close tag and outputtin开发者_开发百科g:

<fb:profile-pic uid="loggedinuser" size="square"> /fb:profile-pic> 

... which in turn breaks the FBML parsing engine.

I am not using the fb prefix for Radius, so there is no clash, and indeed, I can get many of the tags to work by using the self-closing format:

<fb:profile-pic uid="loggedinuser" size="square"/>

Self-closing is fine in many cases, but being able to provide content for a tag means that there is content visible while the Facebook connect engine loads.

A quick analysis showed, that Radius has a problem with closing tags that contain namespaces. This is in no way a Facebook only problem.