I often need to search for specific details about an html-formatted email. As an example, I'd like to be able to filter by presence of an image source name (<img src="...">). However, even though I'm looking right at an email "View >> Source" and see it in an email, when I search for that string, it comes up empty.
Some TB add-ons have discussed this problem, but I've seen none that successfully find matches. Thoughts? (I'm otherwise stuck either viewing source one-by-one, or using command-line grep, back-tracking to a specific message id, and grabbing them manually in TB.)
