What’s fixed

• where and not narrow a folder-backed collection. They were built into SQL and so applied only to records: a query over a folder dropped them without a word, and the view got everything it asked to filter out. They are answered against the pages now, with the same operators. A filter that reads a relation is refused rather than ignored — a folder has no relations to read.

What’s fixed

• The control panel stops offering to write into a folder. A collection written as files refused a save but still let you start a new entry, create one and trash one — rows that answer to nobody, since the folder is what serves. Every way of writing to such a collection is refused now; opening one to read it is not.
• A blueprint of a folder-backed collection counts its pages. The blueprint listing counted records, so a collection served from files read as empty however many pages it had.