Apple has released iOS 5.1.1
It's a 54MB update and I'm grabbing it now. According to Engadget, it is said to improve reliability of the HDR option for photos taken using the Lock Screen shortcut, address bugs that could prevent the new iPad from switching between 2G and 3G networks and solve a few issues that were affecting AirPlay video playback "in some circumstances." There's also improved reliability for syncing Safari bookmarks and Reading List, and Apple has purportedly fixed an issue where 'Unable to purchase' alert could be displayed after successful purchase.
So it's not clear if it addresses any VoiceOver issues -- let's finish downloading it first.