Gallery from Event Photos 404

BUG - Gallery from Event Photos 404

When viewing event photos from the path below, users receive a 404 message.

This doesn't happen for all events, only some.
Example Event

http://www.streetsource.com/gallery/events/event/785/relaxing-in-so-cal---may-1

view photos 
Created: +1y
Updated: +1y
Type: BUG
Status: UNREVIEWED
Resolution: UNRESOLVED
Priority: MEDIUM
Url: http://www.streetsource.com/gallery/events/event/1314/relaxin-in-socal
Submitted From: Street Source
K
Gallery from Event Photos 404
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