After upgrading, like many others on this thread, I had trouble figuring out how to use the new/changed options. Apple support has a users guide for 4.2. It is a pdf file, and really large, but I found it very helpful. You can also save it to the iBooks app in the PDF section, read it in safari on the iPad, or save it on your pc and read it there.
Apparently I don't have enough posts on this formum to put the url in this mesage, so I'll put it in the next post.