Deleting a message while viewing it

If you have roundcube configured to flag messages as deleted (rather than moving them to the Trash folder) messages can not currently be deleted while on the "View message" screen. They can be deleted while on the message list screen. Browsers: all

Using page up/page down from message list

In Firefox page-up and page-down keys don't work (at least most of the time) They do work in IE.

Messages I've deleted in Thunderbird show up in Roundcube

This is actually a Thunderbird issue: ​https://bugzilla.mozilla.org/show_bug.cgi?id=220064 If you'd like to see this issue addressed please vote for this ticket.

UPDATE: As of Thunderbird 2.0 there is a hidden property named mail.imap.expunge_after_delete which will correct this issue if set to true. Please see the bug listed above for more details.