Stylebot Chrome-extension CSS. http://stylebot.me/styles/4752

twitter.css

#profile_popup .modal, .profile-card.profile-header, #activity-popup-dialog .modal {
    width: 600px;
}

.account-summary .avatar {
    top: 0.5em;
}

.activity-popup-users .avatar {
    top: 0.9em;
}

.avatar, .route-bigPhotoPermalink .tweet-image {
    -webkit-border-radius: 50%;
    -webkit-box-shadow: 1px 1px 2px 0px rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    box-shadow: 1px 1px 2px 0px rgba(0, 0, 0, 0.5);
}

.discover-item .cards-summary .article, .disco-stream-item .cards-summary .article {
    max-height: 100px;
}

.dm .avatar, .dm-thread-content .avatar {
    top: 1em;
}

.inline-reply-tweetbox .tweet-box {
    margin: 0 auto;
    width: 96%;
}

.js-user-profile-link .avatar {
    left: 2em;
    top: 2em;
}

.mini-profile .avatar {
    top: 0;
}

.permalink .avatar {
    left: 2em;
    top: 2.6em;
}

.permalink .inline-reply-tweetbox {
    padding: 2em;
}

.permalink .stream .avatar {
    top: 2.3em;
}

.permalink .stream .content {
    margin-left: 4.5em;
}

.permalink .tweet-text {
    font-size: 22px;
    line-height: 1.4em;
    margin: 0.5em 0 0.25em;
}

.permalink-footer {
    border-top: 1px solid #eee;
    margin-top: 3em;
}

.profile-card.profile-header .profile-header-inner {
    background-size: cover;
}

.profile-card.profile-header .profile-picture {
    -webkit-box-shadow: none;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
}

.profile-header-inner-overlay {
    width: 100%;
}

.profile-stream .account {
    padding: 2em;
}

.route-home .content-main, .route-profile .content-main, .route-profile .profile-card, .wrapper-connect .content-main, .wrapper-discover .content-main, .wrapper-permalink {
    float: inherit;
    margin: 0 auto;
    width: 600px;
}

.route-home .dashboard, .route-profile .dashboard, .wrapper-discover .dashboard, .wrapper-connect .dashboard {
    display: none;
}

.stream-item .content {
    margin-left: 4.75em;
}

.stream-item .stream-item-footer {
    margin-top: 1em;
}

.stream-item-activity {
    padding-right: 2em;
}

.stream-item-activity-line-me {
    padding-right: 0;
}

.stream-item-activity-me .activity-additional-info {
    margin-right: 0;
}

.stream-item-header .avatar {
    left: 2em;
    top: 2.2em;
}

.tweet {
    padding: 2em;
}

.tweet p {
    font-size: 16px;
    line-height: 20px;
}

.wrapper-search .dashboard .js-user-profile-link .avatar, .cards-media-container .avatar {
    left: 0;
    top: 0;
}

.wrapper-search .dashboard .people .js-user-profile-link .avatar {
    height: 30px;
    width: 30px;
}

.wrapper-search .discover-item .avatar {
    left: 2em;
    top: 0.9em;
}

.wrapper-search .discover-item .stream-item .content {
    margin-left: 6em;
}

#timeline {
    margin-top: 1em;
}

.conversation-module .avatar {
    left: 2.5em;
}

.conversation-module .stream-item-header .avatar {
    margin-left: 0;
}

.list .stream-item-header .avatar {
    top: 0.75em;
}

.newest-members-module .avatar, .search-stream .js-user-profile-link .avatar {
    left: 0;
    top: 0;
}

.conversation-module .conversation-root:after,
.conversation-module>li:after {
    top: 85px;
}

.conversation-module .conversation-root:after,
.conversation-module>li:before,
.conversation-module>li:after {
    left: 59px;
}
.conversation-module>li:before {
    height: 35px;
}

.vellip {
    margin-left: 35px;
}
.conversation-module .missing-tweets-bar .missing-tweets-link {
    margin-left: 15px;
}
.conversation-module .missing-tweets-bar {
    background-color: #fffacd;
}

Improved search results page display. https://gist.github.com/stechico/5362491/revisions