[Lynne]

You have this for the New Thread button:

.newcontent_textcontrol  {...border:1px dotted #999999;
... }

but it isn't in here for your blog button:

#pagetitle  a.pagetitleinfo.textcontrol, .actionbutton_container  a.pagetitleinfo.textcontrol {...border:0;
... }

So you'll need to add it.