The attached image gives more detail on the problem.
This is the second time I've had this now. The first time was with one agent. Now it's three in my friends list, and aparently, myself in the About Land window.
Basically what i think happens is communication between the client and the agent domain server isn't completed fully and not all agent names on the list is downloaded to the client.
This leaves agent names BLANK in the agents profile page, your communicate friends list, and third example in image: the About Land window.
When trying to IM one of the affected agents, the name tab on the communicate window remains blank, however when they IM you back, their correct agent name is displayed.
I do not know of a recreation for this issue, but i believe it should be looked into more closely.