I am using a shirt from the G2 Businesswear Smith Micro product. I load a Jessi Figure, Load the shirt and conform it to the figure. So far so good. Then when I pose the figure, the shirt "explodes" all over the screen. Can anybody tell me what I am doing wrong?

This happens with Poser Pro and Poser 8.

This topic has been covered before in other posts.  It usually comes down to the video card.  Make sure your drivers are current for your particular brand and try changing from OpenGl to skree under General Preferences

Thank you for replying Hborre.
I had just updated the driver and switched to SreeD rather than OpenGL, and discovered the problem shortly after that.
In desperation I saved out the obj file and ran it through PhilC's OBJ2CR2, so that I now have a usable version of this shirt.

Did the shirt render like that, or just preview?

Good question, Tzorg, I had not thought of rendering it.
Firstly, I have the problem on both my computers, so I don't think it is the graphics driver. As far as I can make out, only this shirt is affected. I am a bit miffed because I paid for it, and it is a Smith Micro product.
With indirect lighting, it renders in its exploded form, looking like the preview.
With normal Poser lighting, all I get is a black screen, which seems to indicate that the exploded mesh is blocking all the light.

I'd at least report that problem then...