When trying to select the BIRDS checklist in the Taxon Dictionary Browser it fails to switch to the checklist and presents me with an empty information dialog (attached). If I try and search for a taxon and select it (I can see the taxon in the find taxon dialog) I get the dialog "the specific taxon was not found in the current list".  If I go via the Taxon Dictionary Details - all seems fine and I can browse the checklist to my hearts content.

This problem rings a vague bell but my search terms aren't coming up with anything.