Yosemite bugs: Fans, High CPU Usage

Hi, my late 2013 MBP Retina was updated to Yosemite recently (on the day it came out, so indexing is definitely complete), and I started having these periods of time when Kernel_task would take up over 400% of my CPU (seen on iStat pro) and the laptop would just lag very badly. The fans have also not been running (no wind movement or sound) even though I tried to use istat pro to force the rpm to the maximum.
I thought it might have been a problem with iStat pro so I uninstalled it but the fans still don't work. Have rebooted a few times, done fsck, but no dice. Tried searching for similar problems but everybody seems to be complaining about their fans working too much, haven't found a complaint about their fans not running at all. Hoping mine isn't an isolated incident, or I'll probably have to bring the computer in to check instead of waiting for an update.
Anybody has any suggestions or advice? Thanks in advance.

You have probably already tried an SMC reset, but if not I would try it
support.apple.com/kb/ht3964

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    Attachments:
    2014-06-22-233238_530x119_scrot.png ‏9 KB

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                        111                       1111    1111111111
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        322222111119999900077776666622222111119999000088880000000000
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     90       *************         *****     **********************
     80       ***************************     **********************
     70       ******************************************************
     60       ******************************************************
     50       ******************************************************
     40       ******************************************************
     30       ******************************************************
     20       ******************************************************
     10       ******************************************************
       0....5....1....1....2....2....3....3....4....4....5....5....6
                 0    5    0    5    0    5    0    5    0    5    0
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                  33333333332222211111999990007777666662222211111999
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     90                          *************         *****     ***
     80                          ***************************     ***
     70                          ***********************************
     60                          ***********************************
     50                          ***********************************
     40                          ***********************************
     30                          ***********************************
     20                          ***********************************
     10                          ***********************************
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    First of all, sorry for my pour English.
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    2011-11-18 16:12:02.640: [ora.asm][1510000960] [check] CrsCmd::stat resName ora.asm state ONLINE
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