Large select issue

[eluser]Mat-Moo[/eluser]
I've got a select with around 1100 items in it, however once a user selects over 200 items, only the first 200 are reported as selected. I never knew there was a limit like this (tested on FF and Chrome). Is this server based? Is there anything I can do? For reference it's a list of schools form around the world, which will have quick picks etc. once working. But at the moment it's failing when I pick schools from a single country in some cases.