After upgrading to 7.3.4 I had an error that the teller editor install.zip file timed out.  So I'm not sure if the rest of the upgrade took place due to the Error- however site - when not logged in performs okay, however after login to Host :

Site menu below editor rolls up underneath the menu and all the Admin...Host...Modules  to edit show in a list form not very readable: Editor not working??

What do I need to do to correct? 

If possible, I would roll back to the old version using your backups (you did take a backup before upgrade I assume).  Once you have rolled back, you can re-apply the upgrade.

If you can't roll back, then I would do the upgrade process again anyway.  Most of the modules should do a "repair" which is basically just updating the assemblies.  Those that didn't get correctly upgraded the first time (like Telerik) will get installed.

Hi Mike. I'm not sure what version you have upgraded from, but this looks to be more skin/css issues. There may have been some styles in the upgraded default.css that is causing the layout issues.