[64 bit] Adobe Reader 9.4 - write permission on ntfs

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http://ubuntuforums.org – I am using reader 9.4 on ubuntu 12.04 x64 and I have a little problem. Because of dual boot system I need to keep docs on a ntfs partition, but permissions are set ok and my user account has read and write access to every file and directory. But when I open a pdf file with adobe reader if I try to save a copy with a different filename or on an other directory in the ntfs partition the operation is forbidden and the reader says tha I am not allowed to write to that name/directory. Now I solved writing the file to the home dir and the I move the file to the appropriate directory, but it i (Hardware)