Normally, to write this kind of chars, ö ó ñ, on Linux, you can press Ctrl+Shift+U+code of the character.
In particular, ö is Ctrl+Shift+U+F6, and in ST2 whenever I press F it opens the Find panel (triggered with Ctrl+F). Is this really wanted?
I suggest for ST2, whenever the combination Ctrl+Shift+U is pressed, to forget about all the other hotkeys.