In the SL Wiki there is a page titled LIMITS. This page lists most of the limits we encounter in SL. The page updated today to indicate the change from the main viewer with a new mesh uploader.

::Since viewer release 3.8.4, processing of meshes in the Collada file that have faces assigned to more than 8 materials has changed. Instead of simply dropping the extra material faces, the uploader now creates a new object to accommodate them. The result is that the single mesh is divided into multiple objects (prims) in a linkset (or coalesced object). Thus the limitation to 8 materials is removed as far as input is concerned, but still applies to each of the resulting linked objects actually uploaded. As a consequence it is now possible to upload a mesh with more than 174,752 triangles, although it will be divided into multiple objects. (Reference)
This sounds like a good change. But Drongle McMahon made this comment in my blog about the change (I’ve done a little editing on it – reference):




