this problem seems to happen on more exotic browsers such as Konqueror
Correct - I am using konqueror. It should be a problem with Safari
too if it is konqueror-specific since Safari (MacOS 10 standard
browser) is based on the same HTML rendering component as konqueror.
this issue was related to a DHTML feature that is not support by Konqueror, I have updated the corresponding Javascript to make it work on all browsers
FYI: Konqueror does not allow myCombobox.value='someOptionValue', instead you need to do myCombobox.options.selectedIndex=someIndex