I'm currently running the Mozilla Thunderbird 2.0.0.23 desktop email client. In Thunderbird, if I type "linksys router" in the search box, it will find every message in the current folder containing that string. However, if I tag a message with "xbox 360", a search for "xbox 360" returns nothing.
Is there an add-on that allows me to search across tags? Would upgrading to the newest Beta version give me this functionality?
So far I've tried the GMailUI add-on and that didn't help.

