0) Try and flush the menu cache, theme cache

One of the most complicated user interfaces in CRM systems is frequently the profiling interface. You want to sort your contacts, filter them and literally create formulas of filters that you can save.

While working on just CSS changes on your Drupal website, it can sometime take ages to reload on performance heavy pages.

Drupal's user experience and interfaces have gotten a lot better with Drupal 7. Still, there are a few areas that need more work.