I have a Tkinter Entry widget and a Hungarian keyboard. When I press the ő button on the keyboard, the Entry widget displays õ. ű becomes û. (I haven't had this problem in other applications since Windows 3.1.)
Edit:
I do have two language settings on this computer and when I start changing them around, the problem disappears.
What can I do to make Tkinter handle my input correctly?
It looks like it is a problem with changes to the keyboard layout, as Tk (the library under Tkinter) on Windows doesn't do anything with the lParam in the the WM_INPUTLANGCHANGE messages. That's a bug.
There is a Tk ticket here: Tk Ticket
Unfortunately, the issue might be TkInter only.
Would it be possible to get more details and make a test using plain Tcl/Tk ? So, download a current tcl/tk starkit or distribution and try the script:
pack [entry .e]
and look, if the problem is present there too ?
Please report to the tk ticket, anonymous login might be required there.
Can't reproduce your problem. Works for me with Tk and tkinter as well. See the Tk ticket.