FYI, here's a copy of the email I sent out to registered users,
This is a special mailing for users of Inventua modules to warn of issues with DotNetNuke 4.4. You are receiving this email because you are a registered user at www.inventua.com.
Warning for users of Inventua modules
Due to a couple of bugs in the new version of DotNetNuke, users will experience issues with all Inventua modules in DotNetNuke 4.4. The problem has been reported to the core team, and they are incorporating the fix into DotNetNuke 4.4.1.
Until DotNetNuke 4.4.1 is released, users of the Inventua Sidemenu, TopMenu, Shadow, Google Search, Media Player, Flash Player, Quicktime Player, Paypal module, System monitoring toolkit and PassThrough modules are advised to delay their implementation of the new version.
If you have already upgraded to DotNetNuke 4.4., please contact us via email - support@inventua.com, so we can help you to get your site running.
If you are using the Inventua HrefExchanger (Url rewriter), be advised that a seperate issue affects that product. You can download an update for use with DotNetNuke 4.4. from http://www.inventua.com/dnn-hrefexchanger.content