Put this in ~/Library/Application Support/Flowdock/userstyle.css -- Would like to make the small names use less space, but not sure how to manage the widths. -- I would like some nicer indication of which flows are private chats. -- etc etc

gistfile1.css

@media screen {
  nav#tab-bar, nav.desktop {
    height: auto !important;
  }
  ul#tab-list {
    white-space: normal !important;
  }
  li.tab {
    display: inline-block;
    max-width: 150px  !important;
    min-width: 60px !important;
    width: auto !important;
    font-size: 10px !important;
    vertical-align: 0px;
  }
  li.private-tab div.tab-name {
    color: #E6FEE6;
  }
  li.flow-tab {
  }
  
  a.tab-link {
    padding-left: 15px !important;
  }
  
  div.tab-fade-wrapper {
    padding-right: 5px !important;
  }
  div.tab-fade-wrapper:after {
    width: 5px !important;
  }
  button.tab-close {
    padding: 0 !important;
    float: left !important;
    top: -3px !important;
  }
  i.activity-indicator {
    font-size: 8px !important;
    width: 12px !important;
    height: 12px !important;
    line-height: 8px !important;
    padding-top: 2px !important;
    float: right;
  }
  
  i.activity-indicator-chat,  i.activity-indicator-mentions {
    width: 8px !important;
    height: 8px !important;
  }  
  div.mentions-dropdown-wrapper {
    padding-top: 0px !important;
  }
  #tab-list.overflown > #flow-dropdown-item {
    position: relative !important;
  }
  

Drag'n'drop breaks