This is a new problem that cropped up on a live 1.2.7 store in the last couple of days. This store uses the UPS XML mod and it was working fine last week. This morning the owner contacted me to report that the estimator pop up window is showing blank (nothing) under the line for "shipping methods" and "rates".
I have tried copying all the data from the mod as it was exactly and reintalling the mod. No cigar. I tried changing the sort order of the mod (even tho no others are enabled). I have checked to make sure we did not customize the Shipping Estimator template (we did not, it's just the default).
Any ideas what I should be looking for? It seems as is there is no shipping method detected?