err:shlctrl:Control_DoLaunch Applet not found: My?

r59130, Czech installation.

It is not possible to open the Mouse applet in Control Panel. Error as seen in issue Summary is echoed into the log (the applet name should be "Myš"). If I create a shortcut on the desktop for it, it can be opened. If I run "control mouse" via CTRL+R, it can be opened as well.

I checked that the related .rc file is in UTF-8 format and that it's in
// UTF-8
#pragma code_page(65001)
section in its rsrc.rc file, so there should be no trouble caused by it. Other applets using diacritics such as "Klávesnice" or "Herní ovladače" work correctly.

EDIT: The change in rsrc.rc file was done only in my working copy to try to fix the issue. There is no change, however.
It seems like there's an issue in the Control_DoLaunch function or one of the functions calling it. Since "My?" differs from "Myš", no applet is opened.