[Trac] TracTags 0.3.1 out - expression language query

[Tim Diggins]

 >  * Added a basic tag matching expression language. eg.
 > (ticket+workflow)-(closed|wiki)

Am happily using TracTags 0.3.1 but want to be able to find if something 
is a ticket in an expression - expression=ticket+<tag> doesn't do it for 
me... I have to use expression=(closed|new|open|reopened)+<tag> which is 
wordy and also seems to cause problems with ListTagged.

I've got the following in my trac.ini:

[tags.ticket]
fields=component,keywords,owner,reporter,cc,status


Is there some magic I'm missing?

thanks