Firmware Update 1.7 drains battery and causes problems for sound

I have a Macbook Pro early 2011 with a SSD. After installing Firmware 1.7 I saw the beach ball over and over even after rebooting... this problem got resolved after I plugged in power cable and is now gone even when it is running on battery. But the sound of my MBP goes randomly on/off when I plug in/out my headphones and the worst problem is that prior to the 1.7 I got up to 5 hours of battery but now only 2:30 hours. I've only 470 cycles of my battery. Resseting the SMC didn't help and unfortuaneltly there is no way of downgrading the firmware. What should I do?? This is definietly a firmware problem which supposedly was released to solve a rare battery problem on some machines not to cause problems on others.

I am seeing this problem as well.
Before the SMC Update 1.7 the battery was fine. After, it hibernated within a half hour of use on battery. Upon wake-up the Service Battery warning is in the battery menu, and the time remaining calculation has gone from several hours at a full charge to less than 10 minutes.
My battery is original MacBookPro8,2; I rarely work on battery, relying on it mostly to keep my computer going while asleep during a half hour commute to/from work. System Information's Power tab reports
Cycle Count:          19
I plan to try a battery calibration soon; if that fails, then the Apple Store.
e

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