downloads seem to stall or freeze when an http proxy like squid is used.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. install, configure and start squid, my machine defaulted to listening on 
localhost:3128 (squid 2.7.STABLE9-4ubuntu4)
2. set the environment variable http_proxy to localhost:3128 (new terminals 
should get that automatically)
3.try an album download

What is the expected output? What do you see instead?

Usually just downloads all the files.  With http_proxy set, it usually succeeds 
on the first few downloads and then freezes in the middle of a file.  For what 
it's worth, I've seen the same sort of freeze sometimes *without* squid, but 
it's much less common.  strace showed clamz spinning on poll(), repeatedly 
timing out.  (squid seems to be functioning fine while this is happening, I can 
download other files through it concurrently)

What version of the product are you using? On what operating system?

clamz 0.5 ubuntu 11.10 x86_64

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 14 Feb 2013 at 4:21