Unfortunately even with a month of testing we went through, when version 3.4 was launched in live environment a number of problem was identified. I will use this thread to list the known high priority problem, workarounds and our work on fixes.
1) Link tracking in previously sent emails might not work (while link tracking for newly created emails works fine). Our team is working on a fix and we expect to deploy it by Tuesday morning march 30th. There is no workaround.
2) After login people are not returned to whatever page they started login from. This means they have to manually navigate back to the needed page.
We are currently investigating this problem.
3) Some clients with heavily customized sites based on themes with newly released dynamic menu (see http://help.wildapricot.com/display/DOC/Release+history ) might see dynamic menu mismatched to their customizations.
Workaround: go to CSS Customization, click on edit and then save. Dynamic menu should disappear (later on you can renable it and customize as necessary.)
Fix: We are working to hide it from those sites.
Dmitry Buterin, Chief Apricot