I don’t remember having encountered this before the upgrade, but one thing is for certain – (with Firefox, anyway) I am unable to copy and paste code from any posts that have properly surrounded said code snippets with AS or CODE tags.
This is BAD, BAD, BAD. That means anybody who wants to use code snippets provided as solutions to problems must retype them, which gives rise to all manner of complications due to the potential for introduction of errors and/or the omission of crucial elements.