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it might not have been the 1.1.2 update. you might have finally typed "oh" so many times that your phone learned that "oh" was the preferred word and not "on."
 
Yay!

I didn't notice this until you pointed it out; I have slowly trained myself not to use 'oh' anymore for the shear hassle (see what this crazy thing has done to me?!) Now, if I could only type 'w/' without it auto-correcting to 'a/' 😱
 
I can't stand the autocorrection on the iPhone! Wish Apple would provide an on/off toggle switch under settings - without having to hack it! (...like the way KB is in installer... but I don't want to jailbreak mine...)
 
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