The dashed line on new Atahualpa does not seem to be the same as the old one - where page menu (along top) apperas more like marching ants (marquee), rather than the simple dashed lines that border the header and sidebar regions. Could it be that a doubled dash is being defined that is causing this to look thicker than it used to be?

Also - where can we style fonts in the admin pages besides the link/post page? I presume this can be set to anything we like in your actuall css file(s) but I had imagined font is a natural thing to want to tweak...

The borders are still "dashed" but the font is a bit smaller maybe that's what you notice, the font can be changed at the menu tab "Page Menu Bar", the "dashed" can also be changed to "dotted" or "normal" there

You can change the fonts at many places but most of the time you'd have to write the actual css rules, i.e.

font-family: verdana, "comic cans ms", helvetica, sans-serif;
font-size: 0.9em;
font-weight: bold;