Yap! Same here.
Update was clean, hat to reinstall HDA and re-enable TRIM. But Logitec C270 and C310 are not recognized, just the Mic. BUT! works perfectly with my MBP running 10.9.2.
And it seems that speed stepping ist working properly. Intel Power Gadget shows the full cpu speed (i5 2500k, not overclocked).
Any suggestions anyone?