Hi Phill Hodgkinson,
The weekly builds will be no longer available with support of backward compatibility. We are only releasing developers only weekly builds in which there is no guarantee that they will be able to flawlessly upgrade to our official version.
We have outlined our Sitefinity Roadmap
that further explains our future plans. The service pack is scheduled in about a month time, while the official Q1 release is scheduled for April.
Please let us know whether there is anything else we can help you with.
the Telerik team
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