In the first two posts of this series I went through the feature list comparing phpBB2 with phpBB3 from the list posted at phpbb.com. I then included notes discussing which new features for phpBB3 I had covered already by adding MODs. At this point the score is 1-1, based only on my needs and use of the code. This is the third post in that series and I will cover the Posting, Attachments, and Caching feature categories.
As a disclaimer: this post is not intended to be a criticism of phpBB3 in any way. It is simply a way for me to formally review the features provided by the latest version as compared to what I am currently using, and help evaluate whether I should prioritize an upgrade or remain happy with what I have.