Sony's survey at the following link has the following question:
http://connect-metrics.custhelp.com/...eys/ws?_133=22
"7) Sometimes a publisher may submit eBooks that are incomplete or contain typos. If you experience this with any of the eBooks you purchase, please provide us with as many details as possible (page number (e.g. page 101 of 1001), the misspelled word(s), etc.) so we can forward and have them corrected. Please provide us with your email address as well so we can notify you when you will be able to download the corrected version."
Which makes it sound like typos are fixable and that they will fix them if you tell them about them.