Second Life 2.6.0 (218701) Jan 11 2011 08:43:57 (Project Viewer - Mesh)
CPU: Intel® Core2 Quad CPU Q9400 @ 2.66GHz (2666.62 MHz)
Memory: 8191 MB
OS Version: Microsoft Windows Vista 64-bit Service Pack 2 (Build 6002)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce GTS 250/PCI/SSE2
Problem is with either upload method. As soon as you select a filename the viewer goes out to lunch. No error messages or anything, that's what particularly frustrating about troubleshooting it.
I have been able to get some meshes to go. If I create them in 3dsmax then I generally don't have an issue. If I create them in AutoCad, convert to fbx and then to dae, it dies. I realize I'm a bit of an oddball for using Autocad, but that's what I know. I suspect its making something odd in the collada file, but I haven't got a clue as to what.