Version:           3.3.1 (using KDE KDE 3.5.1)
Installed from:    Unlisted Binary Package
Compiler:          gcc version 3.4.5 Configured with: /var/uhubuild/work/compile/configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --enable-languages=c,c++ --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib --host=i586-uhu-linux; Thread model: posix
OS:                Linux

So I define F2 in kdevelop as the hotkey for save all. Then I close kdevelop, open kwrite and define F2 as save. I close kwrite and launch kdevelop, in the hotkeys list there is two F2 hotkey: one for save, one for save all. I think in kdevelop the kdevelop specific (which one was set using kdevelop) setting should override the kwrite (kate) specific one, and anyways there's no reason to prohibit one f2-save-all-for-kdevelop and one f2-save-for-kwrite to coexist. (As current behaviour kdevelop only saves the current tab after setting the hotkey in kwrite).