We had trouble getting our web apps working, and found that the lack of thread-safety in Params::Classify::XS was the problem. We bypassed the XS module and now our web apps are fine. However, I've been trying to use Net::Twitter, which has a ton of dependencies in Moose and MooseX. One of those dependencies is Class::Load::XS, which I can't install now because of the problems in Params::Classify::XS. This has been a major hassle, and I just wanted to ask if there were any suggestions on what to do. I'm trying to write my own, simple Twitter client using Net::OAuth but that's not going well. So here I am. The error I'm getting when trying to install Class::Load::XS is as follows: Could not load Class::Load::XS: Undefined subroutine &Params::Classify::is_string Any help would be greatly appreciated. Thanks