With the inclusion of Havok code in the viewer to handle Pathfinding’s Navigation Mesh (Navmesh) things had to change. The Havok license restricts its use to the Second Life™ grid. This means the Lab is removing support for the command line options: –loginpage, –loginuri, and –helperuri.
That effectively prevents the Linden Lab™ viewer from being used with any grid other than the Lab’s.
Now the Dolphin 3 viewer is dropping support for OpenSim. You can read the announcement on the Dolphin 3 blog: Dolphin Viewer and support for OpenSim.
Basically it is too much work for a one-man team to maintain two versions of the viewer. So, version 3.3.19 will be the last version usable on OpenSim.
I’m bummed as Dolphin was my viewer of choice for OSGrid. But, I can understand Lance’s challenge.