its not a fix, its some old FCC law which stated 160 was maximum message length back in the day of pagers. Phone carriers split them automatically that's why they come in sectioned. CM doesn't do it by default that's why you have to turn it on in ...
Seems to be a problem among anyone running ICS on a custom ROM, may just be best to stick with the previous version of Chrome in the meantim
How can we install the old version?