由 Christian Eyrich （開發者） 發表於 Jan. 29, 2010 · 永久網址

Thanks for bringing this up. This server sends even the images out as compressed (Content-Encoding: gzip) and when accessing the image from the browser cache directly it's handed to FxIF uncompressed which it can't handle.

I changed the code to not access the cache directly for now and hope this hasn't huge drawbacks. One drawback is that now any No-Cache statements from the server will be obeyed and the whole image refetched.
It will be as such in the forthcomming 0.4, but I'm still looking for alternatives.