Well, we were familiar from SharePoint 2010 and MOSS 2007 the bi-monthly "cumulative updates" and some of you probably just wondered when the first "CU" will become ready for SP 2013…
So the good news is: A few days ago, the SharePoint 2013 March PU (public Update) has been published
Ok, if you are now curious on "what's the difference between a CU, PU, etc.", then have a look at this great post from Stefan Gossner: Common Question: What is the difference between a PU, a CU and a COD?
So here are now the Links you might have awaited already
In order to install future updates, the March 2013 PU will be mandatory! So you must install these updates on RTM Farms before you can install subsequent updates in the future!
For servers that include search components, you have to follow specific steps to ensure that you install the PU correctly. Please find here important advise on how to do that correctly: How to install update packages on a SharePoint farm where search component and high availability search topologies are enabled
As usual, you need to run the SharePoint 2013 Products Configuration Wizard on each machine in the farm after installing the packages.
The SharePoint Server pack contains the Foundation packs, so you basically only need to install one Package. The project Server Packs are containing both, so if you install this one, no need for the other two to install additionally.
Update center for Office, Office servers, and related products
Build Matrix for SharePoint Server 2013
Build Matrix for SharePoint Server 2010
Build Matrix for SharePoint Server 2007 (aka MOSS)
Project 2013 and Project Server 2013: Language Packs
I have problems after install language pack, the first window of Central Administration shows an css sprite at the top and after creation of a web application or Site Collections there are some issues in navigation and native controls in the master page.... some people talk about the same problem in their farms but no information or solution to this problem... do you know about that?