Upgrade from 4.1 to 4.2
Dear Charles
1395 is the number the number of 4.1 SP1.
Any custom code or controls in your solution that were build against that and would need to be updated.
Markus
Hi Charles,
As Markus suggested, the problem may be coming from custom controls of yours which need to be built using the new assemblies.
The following article may be useful to you:
http://www.sitefinity.com/devnet/forums/sitefinity-4-x/bugs-issues/upgrade-to-from-4-2-to-4-2-sp1-problem.aspx
All the best,
Victor Velev
the Telerik team