Claws mail breaks outgoing messages (Tree view)

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http://crunchbanglinux.org – I've got an issue with Claws Mail client. After I replied to an e-mail it shows the history of e-mail in a dropdown style in the main folder browser. However it brakes long messages into short bits and thus creates 5-10 entities. Here are the screenshots:Uploaded with ImageShack.usAny tips about how can i get rid of that? :) (HowTos)