Category picker: auto-completion: awfully long on IE6

I do not know the alogirthm used in order to make the category auto-completion form work but this is awfully long on IE6 (it even suddently directly close my engine without asking and I lost all the content of my title+big text). The CPU of your IE is at 100% for quite a long period of time.

It looks like behaving a bit better under FF3 (but still quite slow and CPU consuming for your PC)

[ If I remember correctly, Jahia 5 was implementing auto-completion only from 3+ char. Perhaps this could help]