Never saw anything like this before... 3.9.0cvs17 (in case it matters, I was compiling cvs40 at the time; installation not yet started) Selected a message and clicked Trash. Message changed color to blue and list selector moved to next message. Message to be trashed had a white-on-blue "<" icon which apparently means Move Pending or somesuch. Selecting that message gave what is in the attached screenshot. Clicked on Network Log and nothing related to this was in the log. I only use POP/SMTP (never used IMAP), so the "network" issue makes no sense to me. More strangeness... just switched back to mail desktop and CM is back to what it looked like before I hit Trash -- like none of this ever happened. The blue is gone, as is the icon. and the original message contents are visible again. Only desktop switching occurred... Hit Trash again and it went to trash as initially expected.... [cue Twilight Zone music...]
Created attachment 1201 [details] screen shot of Trash failing
looks like a temporary network problem to me, I see no bug here
Now you've got my curiosity... What network activity is related to moving a message to Trash in a local-only MH setup? Then, I'm really puzzled how Move Pending was automatically undone... :)