As you are aware, we implemented Multiple Document Support (MDI) in Adobe RoboHelp HTML 7. However, this change resulted in a small performance bug on systems having large number of fonts installed on your system.
I request customers to remove the extra fonts that they were not using for enhancing problem and believe me I hated stating that. However, today I am happy, as we have fixed the problem and the fix is available through Tech Note – 40336 on Adobe.com. All you have to do is download a single dll and replace it in the Adobe RoboHelp HTML 7 installation.