Internet browsing "wifi service only"

Running a Boostberry on the Monthly Unlimited Plan. I used to be able to browse the internet (slowly, but browsing nonetheless) over the phone's data stream. The whole "unlimited" part of this Boost plan supposedly includes talk/text/web. Now anytime I try to use the Browser, I get a message "This is a wifi service" and am instructed to get connected to a wifi connection first. It's like there is no more data capability over the cell signal. Is this downgrade something that happened with the newer 5.0 version of BB OS software? Any ideas?

Does the Boostberry Unlimited Plan specifically include Blackberry data? You will normally need a specific Blackberry data plan to use the data functions on a blackberry rather than a normal carrier data plan.

The Blackberry plan is an option with Boost ($10 extra/month), and I would need that to used BB-specific services like e-mail forwarding, etc. But basic data (internet access) has never required a BB plan, at least it's always worked until recently.