In the Activities lists that show up while working in the Case or Activities tabs, you can filter your list with four preset filters. The default filter when you open the activities list is
"My active activities on or before today"
As funny as that name is, I have been unable to figure out how to get any activity to show under this filter, even though all the activities I've created DO show up under the "My Activities" filter.
I figure it has something to do with the "active" part, since even activities created on or before today don't show up.. but shouldn't every activity that is marked "In Progress" count as active? If not, what makes a activity active?