I've had the very same issue

ASSERTION FAILED: "(bm_bitmaps[n].handle == bitmapnum)" at bmpman/bmpman.cpp:2039 bitmapnum = 1061491798, n = 4548, bm_bitmaps[n].handle = 0
My PC is:
SVN 7648 Debug build (hacked to get around a jpeg library mismatch)
AMD Phenom(tm) II X2 550 Processor
GeForce GTS 450 (275.09.07)
Linux skywalker 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:07:13 UTC 2011 x86_64 GNU/Linux
BP 1&2 also work fine for me.
It's actually prevented me from playing WoD at all, I think the 1st mission started successfully for me once, and it's crashed about 5-10 other times. I've been meaning to dig through the code to see what is triggering the assertion, but I haven't got round to it yet (too busy with PVS studio stuff).