After doing a Wordpress upgrade I notice that there are some files that have an old creation date. Am I safe to delete these on the assumption that they were part of the previous release and so aren't needed for the latest release?
I've used windiff to compare two different downloaded releases (i.e. not my live site) and I can spot files that were in the old, but not in the new, but it would be easier to get rid of the old ones if the answer to my question above was "yes".
For example, comparing 3.2.1 with 3.3.1 there are 80 files in 3.2.1 not present in 3.3.1. Here are a few: