What program for authoring flowcharts

[Kevin O'Gorman]

The main flowchart editor I'm aware of is dia, which I just tried
again (v 0.97) and find unusable.  List of complaints on demand.
I'm more familiar with xfig, but it's not specialized for flowcharts.
I'd like prefab chart objects, bendy lines and so on.
I've seen the drawings of Bluej, but it's Java-specific for
class/object relationships and not in a portable format.

Suggestions?

-- 
Kevin O'Gorman, PhD