Well it is the disk mounting that is causing the panic. It definitely looks like the seatbelt panic. You might try reinstalling it from 10.5.5 anyways, it couldn't hurt.

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HP Pavilion dv6775us - Intel Core 2 Duo T5450 1.67 GHz | 3GB DDR2 | SATA 250 GB 5400 RPM | NVidia 8400M GS | Realtek ALC268 | Realtek RTL8101 | Broadcom 4311 | HP Remote (Front Row + ControllerMate) | 10.5.7 (Voodoo Kernel 9.5.0)

HP Pavilion a1560n - Intel Pentium D 915 2.8 GHz | 2GB DDR2 | SATA 2300 GB 7200 RPM | Intel GMA 950 (DSDT patched)| Realtek ALC882 | Intel 82562v | 10.5.7 (Voodoo Kernel 9.5.0)