I am also finding images missing from my posts. I am linking in from Imgur. The images are in the post when I first post it but are gone when I come back to the post later.
I also find it interesting I can not get in my post to edit it. I have copied and deleted then pasted in a new post which works if I get back before there are any replies.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.