QUOTE(Lking @ Sep 23 2009, 05:26 AM)

...Why should SpamCop spend the time and effort to identify and uniquely report all the errors produced by all possible browsers? They do identify an error and thus protect the parser and the reporting systems - which is the objective to my mind. ...
We possibly need to differentiate between what the parser does with the headers and what it does with the bodies. It can't be expected to deal with mangled headers, it does deal with some 'common' non-standard headers (both provider and application caused, what Julian sometimes called "bizzaro' IIRC - perhaps that term is still in the parser results where applicable?) but it should (ideally) be sunnily unfussed by the bodies. The bodies aren't the main mission after all (as Lou says) and aren't even looked at in quick/VER reporting - but other members keep demanding that bodies be parsed for spamvertizements (and all that goes with that, including HTML interpretation, ignoring innocent bystanders/'free' webmail advertizers/'free' antivirus plugs etc. in the process as just a small part of that).
As George says/infers, an unexpected result in handling bodies may be symptomatic of some deeper problem. The "No data / Too much data" message reflects some sort of error trapping one suspects but it is too general, not to mention misleading in this circumstance. Looking at
http://forum.spamcop.net/forums/index.php?showtopic=807 maybe confirms an IE6 problem with 'non-Latin' characters, perhaps as also indicated by Steve T, above (maybe the problem under discussion is not unexpected after all) but the explanation given in the error dialog box (unchanged all this time) is quite inadequate:
QUOTE
No data / Too much data
You are most likely submitting a very large email. Please trim some of the unnecessary data (noting where this has been done) from this posting and try again. SpamCop will no longer accept email larger than 50.0K bytes.
Other possibilities: You may have a firewall which prevents HTTP POST commands, you may have linked to the wrong URL or your browser does not handle binary submissions correctly (try a different browser)
It doesn't mention the special characters thing with IE6 (only IE6? - and if that is part of the binary submissions thing it is way too obscure) and it doesn't mention the old Netscape 4 problem (arising, ironically, from a special accommodation for a specific browser IIUC).
If it is not feasible (who knows?) to trap these errors individually then maybe that generalized error message needs to be re-named and the explanations expanded a little. Even if there are very few people using those browsers now, it shouldn't cost too much to alter a dialog box. I would be suggesting that, as a minimum. The more profound problem with (later version) IE header mangling for e-mail submissions is a different matter and has its own momentum with a much larger potential user-base.
Is that reasonable?