So I've never seen these spots yet on any of my images (just rolled over 4K on my 40D) until today.
My wife and I took our son to the Kids Quest Museum and because of how dark it was I had to use my newly acquired 430EX. This is my first extensive use with it and these are the first images I've noticed these spots on. Also, they are NOT on every image, so I'm not sure what's going on here.
I did a search and saw that this is somewhat expected with long exposures at higher ISO, but mine were probably 1/60-1/200 and ISO 100 or 200. So the only thing I could think of was the flash causing the issue?
Is it anything to worry about? Tomorrow I'm going to go and take some shots outside to see if I notice anything.
Example photo below (nothing done to it besides converted from RAW and then just a slight resize):
In this particular photo I've only found two, one much worse than the other...
http://www.fcwolfpac.com/mclovin/IMG_4117.JPG![]()
Please advise!
Thanks

I'll try to keep up posting this time 
