Microsoft Watch's Joe Wilcox, in solemn observance of Friday the 13th, compiled a list of Microsoft's ten most unlucky breaks. The strokes of misfortune chosen were weighted according to heinousness (with #10 being least signficant, and #1 the most).

Checking in at #7 is the development of the Linux kernel. Putting aside Microsoft's whole Schrodinger's cat sort of approach to Linux over the years (Linux is not a threat. Linux is a threat), it is interesting Wilcox (and the analysts who helped him narrow down the list) focused on the kernel as the bad break.