Filters are responsible for many heart stopping moments in RV. You're humming along when you suddenly realize, "OMG they have all disappeared!!!" What is "they", you ask? Anything- your contacts, your workflows , your templates.... if they "suddenly" disappear don't worry! At some point you hit a filter and you just didn't realize that sucker is still working.
First, click the x next to filters. If you don't have that option, click the Person icon. That takes you back to the general contacts screen and you can click the x and Voila- everything all better. This works in Workflows and Templates, as well.
Another persistent heart stopper courtesy Google Chrome... If you ever have a problem where you update something and the update doesn't stick? If you use Chrome, you need to clear browsing data. and restart your browser. I get bit by that one all the time. Chrome- sometimes you just kill me.
Also, the filter-types visible there are in bold if any that filter is currently activated.