See that test post below? It shows that my blog is set up properly at Flickr. The test post always works, and it shows up in my log files as a successful 200 code.
When I try to blog photos via email, though, or using the Blog This link, it always fails. Those show up in my log files with a 502 (Bad Gateway) error.
Flickr support is still looking at it, but they seem stumped.
So, I wonder if anyone else has ever had this problem. If so, how was it resolved?