The WWers have a hard time enforcing this, because DP PPers submit valid HTML compliant with the DP guidelines. We do sometimes bounce items,
though. Attached is an email of such a case, which also demonstrates there is a fix in the works for DP procedures. Unfortunately your fix is not a fix, in that ebook readers are emphatically NOT "media handheld" devices. "media handheld" devices are those little pre-ebook reader PDA-like devices. Again the e-book reader manufacturers have emphatically decided en-mass that e-book readers are NOT "media handheld" devices. I understand that PG has this mistake coded into some of their tools, but not everyone uses these PG tools, which means that this "fix" breaks everywhere else in the world. This problem has been discussed many times. PG should be following standards, where standards exist.