Froyo - Gmail - Can you delete by message, or only by thread? Running on a out-of-box, unupgraded T-Mobile G2, which is running Froyo, if I'm correct.

This version of the Gmail application has a delete button, which is undocumented in their web help.

When I use it, it appears to delete the entire thread/conversation, rather than a single message. Is this the expected behavior?

UPDATE: 

Found the verison number -> "Version 2.3"
I'd say it's expected behavior. I mean, the big "Delete" button in the Gmail web app tosses the whole conversation to the dust bin. You have to dig a little deeper on the individual message to delete it out of the conversation. (Also, unlike the web app there is no option to view individual messages like a classical e-mail client.)

By the way, have you downloaded the latest Gmail app from the Market? There are quite a number of significant improvements over the stock app.