bugtracer doesn't work for me (maybe it doesn't recognize my few minutes fresh account yet?), so I write it here.
I tried this 0.7 final release as well as three pre-release 07 versions up to RC3, but there are same bugs for me in all these versions including this last final.
I use Luxblend with Blender 2.49 64 bit versions on Linux Ubuntu 9.10, Intel quad core 2.5 GHz, 4 GB RAM.
The scene is simple exterior studio-like (curved desk+objects), no textures for materials, no lights, only BW hdr image for lightning. In version 06 all works fine on every render preset and settings, but in 07 some bugs appear. First, there is some warning popup window (annoying but not affecting rendered image): parameter gain not used, gamma not used, mapping not used and supersample not used. Second, the rendered image has warm yellow-orange cast, eventhough the hdr image for lightning is pure black and white image (and 06 version renders this without cast). This cast can be corrected to some level with lightgroup blackbody temperature, but its never 100% neutral as in 06 version. Third, if I select bidirectional integrator, same warnings appear, but this time adds one more, red and fatal warning: severe error 14 unimplemented light sample_L. This makes the rendered image complete black, evethough the rendering is going on, samples per pixels are growing and CPU is screaming. But no image is rendered, only pure black area.