Unfortunately I was not ready so good as you could, and spent the couple of hours digging Internet to find the right decision for 3 little problems I met after my computer with updated operating system successfully rebooted. The 3 problem, little but critical, as anyone could stop your work as a Web developer.
It would be honest to say, that the troubles, which I will describe in this post, are not related neither to the operating system Ubuntu itself, nor to its version upgrade process. There are no bugs and no crashes. I may talk about my case of course.
You will meet the real problems in case you are the developer and have Apache/PHP installed at your desktop/server with a lot of virtual web servers defined. Add our popular and lovely WordPress here. Otherwise all update process took, of course, some time, but was fulfilled smoothly and without any headache.