Fortunately 1.2.5 CAN connect to the servers and for the few people that still have their jars, they can start playing again. For those of you that don't have backups, we have a simple method for you to get them back. This method involves a program called Minecraft Version Changer. You can download the program by visiting their forum page on the Minecraft forums here. Once you download it simply search for the version you want (1.2.5) and click "Change". Don't forget to backup your other jars if you have any mods on it you don't feel like loosing.