Like the tittle says. I had a couple customized works done to my site and i don't want to loose them by upgrade to a new version. Will all my customized works gone if i upgrade me site? Thanks in advance!
Depends on both what the custom work was, how it was achieved and what the upgrades change. If both the package and the customisation have been done properly then upgrading would be no problem at all; if not then it is possible you would lose the work. Your best off asking the person that did the customisation for you.