When in TL with 2 browser windows open(IE8,Vista) and the same user login, if you change tenants in one browser, any changes will be corrupted by misapplying the tenant name such as:
Ext#-Tenant1-Tenant2 or Tenant2-Tenant1-Ext#
The problem can be manually corrected by editing the extensions.include and users.txt files.
A minor but very disrupting “limitation”.
I have other applications with this same issue, and they don’t allow multiple browser windows open, even with multiple logins.
I'll post this in the feature request section.