All Flow changes should be filtered out when hidepageedits=1 is specified
Checked in betalabs - hidepageedits filters out RC entries that are the changes to Flow boards (posts, topic edits, board description edits etc). However, the hidepageedits filter also filters out the changes that are not, in fact, edits: e.g. edit-header (for converting User talk page to Flow format), delete-topic, delete-post, `hide-post'.
QA recommendation: Product should weigh in.