In addition to the drop-down list in this cell, value can be entered as text. And keys Home/End, instead of moving the cursor to the first-last letter of the text, change text to first/last value of the (currently invisible) drop-down list, losing the current value. And since the first line contains a often empty value, Home is unexpectedly triggered as "clear all".
Maybe disable the movement through the list (if it is invisible), or do it only when the Ctrl is pressed?
PS Still waiting for the unicode editor...
