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.
|Hook Head Lighthouse by kroker|
from Best Photo of the Week
|Green turtle in the shallows by gcachon|