10.7.3 Upgrade Muted My Sound

hi guys

upgraded 10.7.3 find sound became muted, , mute button greyed out not allowing me change it.

had use time machine rollback 10.7.2.

new mac having switched windows don't know if there way on ride greyed out mute button.

else encountered problem?

 

i think got lucky. problems 10.7.3 way worse. it's totally hosed mbp i'm rolling 10.7.2 , staying there till new update released 1 seems quite badly broken.

 

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