I have been playing a bit with installer windows size which seems to have some UX problems:

• it has no restrictions - eg. minimal size
  

• on some screen resizing doesn't remove or add scrollbar (some only add vertical one but no horizontal one). eg. Security domain screen:
  
  

• some screens appears to have hardcoded sizes so they don't stretch in or out as the window size changes, eg. Security domain, SSL screens