Filed a case with QlikView support on this, and it seems that if you're running or planning to upgrade your SAP environment to SAP Netweaver 7.5 (Basis 7.50) you are out of luck. The currently available transports for the adapter are supposedly not compatible. There is a new version of the QlikView Connector for SAP planned, with a somewhat fuzzy release date of "this fall", but support couldn't provide any more details.
The expectation is that the SAP connectors and transports (for Basis 74x) do work against a 7.5 environment. The Qlik R&D SAP connectivity team will set up an internal 7.5 environment in the near future to validate this. But in the meantime feel free to test it yourself! Feedback is much appreciated!