Hello all, Just got an interesting error, which I can't really understand (but that DOES happen a lot...). Trying to work with existention types, record types, and wrapping the whole thing up in a nice IORef for my uses: data ETable = forall a. EditableTable a => ETable a data GuiRecord = GuiRecord {gtable :: ETable, moz :: MozEmbed, pos :: Position, ent :: Entry} type GuiState = IORef (GuiRecord) Generates the following error: Couldn't match `* -> Type bx' against `*' In the type synonym declaration for `GuiState' Anyone have any ideas?? Thanks in advance! Regards, Scott