I had my gmail, calendar and contacts synced on my Nook for quite a while. This morning, I had a message pop up on my email page about permissions, etc. I looked for answers and it was suggested I set up IMAP on gmail. I did all this and the message went away, but I can no longer syn calendar. It asks for a server name but the suggested name give by google does not work. I went through all the steps with a Nook support specialist on the phone and he got the same result and said this is a known issue.
I hope there is a fix soon as I gave up using my outlook calendar since it will not syn unless you are using a microsoft exchange server.
Just in case anyone else had this issue after the update, I now have it working. I found the solution on this outside forum: http://www.mobileread.com/forums/showthread.php?t=135866
I had to put: m.google.com for the server when I set up sync on the device. I now have two of the same calendars, so I need to straighten that out, but it is syncing at least.