Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

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It could happen that a message move in an IMAPx account caused multiple messages being removed from the view, even they were left in the original folder, as stated at an upstream bug report:
https://bugzilla.gnome.org/show_bug.cgi?id=734300

Steps:
a) configure a Google mail account using IMAPx, at least two concurrent
   connections, no QResync, no IDLE (Listen for server change notification)
b) have a folder with at least 6 messages
c) move, by drag&drop, three messages to another GMail folder, can be one
   by one, just start from the previous of the last
d) select the new destination folder and move the messages back, again
   start with the previous of the last message
e) repeat c) & d) for couple times; it happens one that the UI will remove not
   only the moved message, but also the next of it.

The upstream bug report contains more detailed description of the cause.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2226.html