Platform: MOSS 2007 I have document library with versioning managment enabled. One of the users (with windows 7 64 bit) checks-out a document and then open it. after that he get the following header on title bar: "To modify this document, you must check it out" with checkout button.. Can anyone help?

Hi Oferke, It seems that this is an old issue. Lots of people have discussed this problem. But after a lot of search, I haven’t found a certain solution for this problem, maybe you can go through this thread and try the methods there, maybe some of them can help you: http://social.technet.microsoft.com/forums/en-US/sharepointgeneral/thread/80deda4b-91c7-4988-be72-03f904213072/. Thanks & Regards, Peng Lei