I'm using what appears to be V7 of the Zimbra web client. After disabling Address Bubbles and disabling "just show the name," I am able to see names and email addresses of received messages.
My problem is that I cannot seem to find a way to copy-paste an email address without first left-clicking the address (which automatically forces a composition).
For example, if I am composing a message and want to add an address not already in my address book, I might refer to another message and copy-paste that email address. I cannot seem to do that any more in V7, unless I turn on the VERY undesirable HTML mode.