I love using groups, to group my hosts together into clusters. However, clicking the "all computers" tabs only shows all computers NOT in a group. The only way to select them all so I can see the task view of all the hosts at once is to select every group heading + all computers to display them all at once.
I wish their was a single button I could click that would select all computers, those in groups and not in groups.
Don't know if it works, but click on the first and shift click on the last.