I’ve made these quick and dirty changes:
/* occupy more space */
body.index-page #sub_nav,
body.index-page #content,
body.index-page div#header-constrain {
max-width: 95%;
}
/* search input behaves strange when wide, don't have time to deal with this - just move it down */
body.index-page #basic_search {
height: 35px;
}
/* fix squished logo during login */
#login-title #header-image img {
height: 100%;
}
Seems to work, for now. Now to find the line of code that trims the subject line…