http://bugs.winehq.org/show_bug.cgi?id=17502
--- Comment #3 from Dylan Smith dylan.ah.smith@gmail.com 2009-02-24 11:26:29 --- (In reply to comment #2)
richedit: Added missing initialization of nAvailWidth for ME_TextEditor. (Bug 17502) http://www.winehq.org/pipermail/wine-patches/2009-February/069841.html
My patch that fixes the bug is in the git tree as commit b9b9835f9368c83e15451e04c8e0781012ac4a2f.
Please test and mark the bug as resolved if it works for you.