Flickr causes crashes with Aperture
There's is a cooler solution if you are a bit into computers.
You can create an automator script and link it with Aperture. When the connection with flickr is opened, the script will disable sleep on while uploads are pending. Or similar. Google for "pmset", "sleep", "mac", "automator", "script" etc.
|Chicago Alley by tko|
from Down the alleyway
|Callan-5680 by vbuhay|
from What Child's Dream May Come
|Widget by Wilfried HKG|
|Oxbow Bend by stickpointed|
from Landscape - Colour #2
|Isolated by PEB|
from I'm single!