unresolved problems:

- some white lines at the right of thread view

- the coloring of email eddresses in thread view is not well adapted

- the tabs in thread view do not have top borders so they cannot be always distinguished (could be done by a replacement picture)

- when in search thread view the control for frobbing highlight slightly reaches into the first email header

- cannot style checkboxes and radio boxes

- cannot find the autocompletion box for email addresses. So it hs still lightblue background.

what should work: message list, compose, thread view, reply, address book

Minor fix:
- highlight .rr.sr in message list as well - fixes highlighting of checked read messages.
- apply the style only on mail.google.com so that other google subdomains do not get affected

I personally use a version with a bit darker foreground. I can post that as well if anybody is interested.