I have noticed this as well. But it's usually with pictures that I down loaded directly from my camera
even though they are jpg.
What I have been doing lately is run them thru PhotoShop and select "Save for web" from the file menu. And then use that jpg photo
for this site. (I think there is a communication/laguage problem in the system)
But some times this doesn't work
either but have noticed that being persistant does the job. If I get a blank window or nothing happens in a reasonable amout of time, I close the attachment window and start over. Sometimes it takes 3-4 tries.
As for the Photo
Gallery, I haven't had any problems.
I will forward this thread on to the Techie.