[Zope] TAL and quotes

Anyone got an idea for who to work round quotes not being escaped in TAL? I've got a line: <input tal:attributes="value here/mystring" /> mystring may contain a quote that needs to be escaped to " It's not automatically escaped by the TAL engine, unfortunately if I write code to escape it myself then I end up with &quot; because although TAL fails to escape " it does escape &! Also, I can't turn escaping off completely with structure as that doesn't work with attributes. I put this in the Collector but I really need something sooner. Thanks for any ideas. Andrew