> Let's recapitulate: You are currently running +deb7u4 from April 2016 > which is the last good version for you and you see 400 errors when you > use +deb7u5 or any later version up to +deb7u10, correct? Then this is a > different issue because Samuel reported that the 400 errors occurred > when he upgraded from 7.0.56-3+deb8u7 to 7.0.56-3+deb8u8 in Jessie
I just ran through the various 7.0.28-4+deb7 versions from u4 through u10 (it's a quick test to run so I just went through them sequentially). The only one that fails is 7.0.28-4+deb7u10. All other builds work for us. So at least Samuel's and my results are consistent (+deb8u8 and +deb7u10 both include the "infinite loop patch"). Allen