http://bugs.winehq.org/show_bug.cgi?id=11595
--- Comment #30 from Frédéric Delanoy frederic.delanoy@gmail.com 2012-11-26 05:32:58 CST --- (In reply to comment #28)
Wine 1.5.15: As of 6.2.2, November 2012, this is no longer the case: Tested on ArchLinux x86 Kate and NPP play happily together, alternately reloading the changes made by the other application.
Can you please try with the version specified in the bug report (5.6.8)?