It's a random issue - here are the newer ones and some did not even convert from an attacthment link:
http://granturismo.pl/vb5/forum/%C5%...a-bullet/page2
or
http://granturismo.pl/vb5/forum/%C5%...a-bullet/page3
However it does seem like there are more older images suffering from this problem but then its not always like that - its very random....
I did a CHMOD 777 to all directories and images.