The issue manifests itself in bad display rendering in Internet Explorer or non-working buttons. The root cause can be two things. One is allowing Javascript and the other is supporting JSON.
Some things that can be done to fix the issue are:
1) Add your Vault website URL to the Trusted Sites in the Internet Explorer options.
2) Turn off the option "Display Intranet sites in Compatibility View" under Tools -> Compatibility View Settings.
IE displays incorrectly
Moderator: SourceGear
IE displays incorrectly
Beth Kieler
SourceGear Technical Support
SourceGear Technical Support