I'll be posting how to use supersu instead of superuser & let it survive flashing of new builds soon.
Personally I'm using supersu.
Edit: Here it is.
Download & flash from recovery.
http://temasek.hopto.org/Samsung Galaxy S3 - i9300/CM10.1/Misc/CWM-SuperSU-v0.99.zip
Download & copy into /system/addon.d
http://temasek.hopto.org/Samsung Galaxy S3 - i9300/CM10.1/Misc/80-supersu.sh
Set permissions to 755
Eg
XXX
X-X
X-X
Personally I'm using supersu.
Edit: Here it is.
Download & flash from recovery.
http://temasek.hopto.org/Samsung Galaxy S3 - i9300/CM10.1/Misc/CWM-SuperSU-v0.99.zip
Download & copy into /system/addon.d
http://temasek.hopto.org/Samsung Galaxy S3 - i9300/CM10.1/Misc/80-supersu.sh
Set permissions to 755
Eg
XXX
X-X
X-X
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