In general I like the cosmetic changes to Mailwasher, but I wonder why it needs two buttons to switch between "Normal" and "Raw Source" views?

Surely a single toggle button would suffice.

This is such an obvious and simple idea that it must have come up before (although I can't find anything, hence this new message) so maybe there is a programming issue involved.

I'll second this suggestion. A toggle would make a "quick peek" at the raw code much more ergonomic.

The two buttons don't bother me as much as having the view reverting back to normal upon viewing the next msg. But sure, a single button works of me.