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It works fine for me in firefox and konqueror, hence my question :) 
 
My reading of the spec is that space etc. are to be considered unsafe. I 
guess I'll have to figure how to patch TAL to cope with this special-case 
(and img src, meta link and anything else that has a URI). Bleah. The 
TAL code is hard to understand at the best of times ;) 
 
As for manual encoding of a string, there's currently no mechanism for 
it. When I figure the TAL code out, the encoding will be automatic for the 
appropriate attributes. Brian help us if someone *doesn't* want the 
encoding, as trying to add support for "structure" would probably break 
my brain :) 
 
In the interim, you could add a method to the TemplatingUtils class (see 
the customisation doc). I'll make a note to add the method to the default 
templating utils  
class.