Comment 3 for bug 1051227

The problem would appear to be size related. The original problem applies to a selection of photos all sized 4000 x 3000 px (filesize 5M - typical example attached). I used GIMP to scale the size.
-- 3000 px wide (2.6M) caused no problem and the app behaved as expected,
-- 3500px wide (3.3M) caused the app to freeze once (and I was able to kill the app only) and it loaded OK another time
-- 3750 px wide (3.6M) froze the whole PC and required a manual shutdown

It does not appear to be camera related: I look a new photo this morning on a lower setting (3264 px wide filesize 3M) and the app behaved as expected.

Today's manifestions have been different from the last few days:
-- 4 times it logged me out (so a simple login was all that was required)
-- once it restarted the PC
-- 4 times it froze the PC (last screen was frozen, no ability to do anything, no pointer movement)
-- twice it gave a me a static command line screen (not the rolling ones I got yesterday and previous days)
I cannot find any correlation between the apps I had open prior to launching image viewer (if any) and the reaction when I open a large image.
Thanks for your support!