I've installed SugarCRM 6.0.0 Build 3905 and I've noticed that look-ahead searching on contact fields seems to fail after the space is entered between the first name and the last name. This same behavior does not happen on other look-ahead-enabled fields such as "assigned to". I have also observed the contact look-ahead problem on several forms (all I've checked) where a contact name can be entered, so it's not isolated to a single page.

When you type the first name (i.e. "Nancy") a list of matches is given... as soon as you type the space character to begin further filtering by last name, the look-ahead results disappear and whatever name you enter, even if it's a valid contact, will be rejected and the contact box cleared as soon as it loses focus.

Any ideas?