Physiched sleeves aren't rendered correctly.
The coats from Pirate Outfit by Joel Braddock aka Mantodea have physiched sleeves. With OpenMW that sleeves are transversionaly positioned and completly stuck in a "open arms" pose.
You can get that "Captain's Coats" in Gnisis with Zebba Benamamat, next to the Temple.
http://mw.modhistory.com/download-98-1082 Win 10, 64 bits, OpenMW-latest-53158d29-win64 (2015-12-05)
(RM-3058 from redmine: created on 2015-12-05 by Amenophis ., , closed on 2015-12-05 by scrawl .)