I have a client who is reporting that Tridion 2011 SP1 is not fully loading for him. The left panel loads and the ribbon fully loads, but never the center pane. In another environment, he had this problem, but only with Chrome. Now, in our Test environment, it is with Chrome and IE.
I am unable to reproduce this issue in IE9, Google Chrome 25, or FireFox. What could be the cause of this issue?
I know I could tell him to use another browser, but I'd rather understand the root cause so that I don't have to.
We have installed two new GUI extensions in this environment: a custom one and Power Tools. These GUI extensions were first in Dev and they have now been migrated to Test. The client is supposed to test the custom extension in our test environment.