I guess you forgot that we have a limited manpower and several different missions. Of all the bugs I am tracking only one got squashed. All of these are old html4 and standard editing issues. It's annoying to have to wait for a long time in this case, but we're not ready to spend many efforts on that.
Any external contribution is welcome here.
Cached files are used without checking to see if it is current. This is important if an isp has not set its clock correctly. I'm not sure it's so simple, but this should be considered. I see not indication in the HTML 4.0 recommendation that says that it's incorrect. I don't see what is wrong in Amaya.