See the attached test case.
Created attachment 13944 [details] test case
Isn't this the USPS (now trenitalia.com) bug?
Yes, this is a reduction of the trenitalia.com bug (see dependencies), but I'm not sure if it's the only problem there.
Created attachment 13948 [details] proposed fix Notes to self: - looks like trenitalia.com works now, but should test some more; - I only ran fast/forms tests so far.
Comment on attachment 13948 [details] proposed fix r=me
Committed revision 20714.