Sometimes a company in Freebase has two cities in the HQ address area when it really doesn't. If the second city is correct, and you delete the first address line, and then try to add information into the remaining line, the autofill fields won't work. You can type things in there, but the auto-suggest won't "open" and you can't link the field to an actual topic. You have to close out and then go back in.
In case that is confusing :) here's hopefully something that will help:
Company XYZ
Company/Headquarters "field"
Line 1 = Paris
Line 2 = London
Go in and delete Paris. Then try to fill in the other address fields for the London line. the fields that link to other topics won't work.
