Hi,

As you know, all our products work on all current versions of SharePoint (including Foundation): 2007, 2010 and 2013. Although there are still some customers using 2007, this product is coming to the end of its lifecycle.

Starting from now, we stopped running pre-release tests in 2007 environments. We are not actively trying to make the products incompatible with 2007, but some recent changes can potentially cause issues. If you are still running 2007, we ask you to exercise caution when upgrading to make sure none of the recent changes affects your environment. Use a development/test server before rolling out to the production farm and have the older version handy to perform a rollback if needed. Also, be prepared for the eventually complete drop of support for 2007 within the next 6 months.

Please also note that as Microsoft are dropping support for IE8, we are stopping testing this browser version as well. Although our current development practices ensure full cross-browser compatibility, as browsers become more and more standard-compliant, the support for specific quirks of older browsers is expected to be removed as well.