Wireshark-users: [Wireshark-users] [This frame is a (suspected) retrasmission]

From: "bbbluedefense@xxxxxxxxx" <bbbluedefense@xxxxxxxxx>
Date: Sat, 10 Jan 2009 01:07:29 +0100

Hi, I've some problem to send medium (about 2 o 3 pages of html) emails to the smtp server of gmail and now the same problem to post a message to a forum. So I sniffed my traffic and I found the following error:

[This frame is a (suspected) retrasmission]
What's means ?
thx
bdefense.