Hi Josh, thanks for the quick answer.
Well the Situation is pretty much as you describe it. There are many Managed Solutions that make changes to the Account Form, few Optionsets/Fields are being added from 2 Different Solutions, another Solution adds also Controls with OnChange Events, and also an Onload Event for the Form.
But this did not happen anytime before, it is strange that is happening after and only on those Orgs with UR13 installed.
What are the Options/possible Workarounds for me in this Situation?
Thanks and BR
Frenkie