I have to say I'm pretty disappointed to see this post. I've been a long time Zimbra FOSS user under CentOS, and have what I consider a pretty large installation (over 400 users, with around 130 GB of email total). I know that CentOS has never been officially supported, but it certainly seems to be widely used and often times even a suggested platform on these forums. Frankly the prospect of moving to Ubuntu, as suggested, does not excite me at all. I've been using RedHat and it's derivatives (Fedora, CentOS) since the RH 5.0 days. I know Ubuntu is widely used and gets great reviews, but whenever I've tried it there have been just enough differences to make me go back to using the RH line. I guess it goes along with the saying "you stick with what you know". Of course my other option it to buy a RedHat license, but even in this case there is going to be some type of operating system change, which I am not really prepared to get into.
As I said, I know CentOS has never been officially supported, but on the other hand I don't think I've ever seen any requests for help with it on these forums responded to with "use a supported OS" answer. I now fear with this announcement that we will start to see that happen.
I've been using CentOS for a while now, not just with Zimbra, and have never run into any incompatibility issues when trying to run stuff certified to RHEL. I'm sure someone will be quick to point out that I am wrong, but isn't the stated goal of CentOS to be 100% binary compatible with RHEL. Can anyone give me a good answer to why this issue with Scalar::Util has come about, and why CentOS differs from RHEL?