We just received a tip from an anonymous reader (he wishes to remain protected - we've sent WPCentral bouncers round as we speak) who reports that he's received an email notification from both Microsoft and a manufacturer (specifically not Samsung or HTC) to downgrade Mango-powered devices and revert back to a previous test version.
"Hello today we got an email notification from both MS and our Vendor for whom we test it's unreleased (TBR) device (not Sammy or HTC) to DOWNGRADE our Mango units to previous TEST Windows Phone Version as to check MS Servers for smooth Mango deployment/update and if all the Servers are prepped..."
It will then be the case to test the Mango deployment and ensure that Microsoft and the WP team get everything prepped and ready for end-users. Looks like this is fitting in with rumours and speculation that Mango is pretty ripe and ready to burst - it's the 15th tomorrow. Have we all got our kitchen knives at the ready? This fruit is going to be so sweet sliced.
Thanks to our anonymous tipster for the heads up!