When we make updates to Roblox we try to ensure that player created scripts will continue to work correctly. However, sometimes these scripts have to be re-written or adjusted so that they will work properly. Look through your scripts to see where the issue might be and try looking on the forums for help. Other players may have already posted a solution or you can post your script to get help from other scripters.
For information on other building and technical matters, please see the following links: