The full story is at [
wired.com...] .
Highlights: a Carnegie Mellon consortium has found that commmercial software typically has 20-30 bugs per 1000 lines of code; the 2.6 production kernel clocked in at 0.17 bugs per 1000 lines, or 0.57% - 0.85% (depending on the 30 or 20 figure) of the number of bugs typically expected for commercial software. The CEO of a source-code analysis provider notes that most of these documented bugs have also already been fixed.