Link D8 Derailer


I have had my Link D8 for about a month and have had some growing pains as the bike has broken in.  I have noticed that switching gears too quickly causes the chain to get thrown from the front gear hub.  Is this a break-in issue?  (ie chain needs to loosen up.) or a derailer adjustment issue?  (derailer needs to be adjusted.) 

Thanks, Chaz