[Zope] fmt weirdness

[Chris Withers]

<dtml-var "_.DateTime()" fmt="%d %B %Y">

...works fine

<dtml-var "_.DateTime()" fmt='%d %B %Y'>

...barfs with a 'Document Template Parse Error':
Invalid attribute name, "%B", for tag <dtml-var "_.DateTime()" fmt='%d
%B %Y'>, on line 5 of index_html

weird huh?

ideas anyone?

cheers,

Chris