All scheduled workflows were failing to run, with a 'Not Implemented' error recorded in the server log - this affected 2.5.6 only (FC-1001)
When you re-open a report that uses expandable subtotal rows, the expanded or collapsed state of each subtotal row is now correctly restored to what it was when the report was last saved (FC-932)
The member selection dialog for filters is resizable again (FC-953)
The arrow buttons to remove dimensions from the rows & columns lists within the Rows/Columns dialog now work (FC-984)
An intermittent 'Collection was modified' error while opening or using the Home dialog is likely fixed, subject to further verification (FC-1000)