gdbm: Change the gdbm test file to have a different name on 32/64 bit. Fixes #673 and the race condition when running two mason instances on 32/64 bit.
cocoa.messages: use ERROR:.
cocoa.messages: some support for runtime message sending.
ui.backend.cocoa.views: maybe this works on 10.6.
ui.backend.cocoa.views: simplify and add os version check.
Config.macosx: Try to support 10.5.
cocoa.messages: add super-sender for completeness.
ui.backend.cocoa.views: spacing.
layours.hpp: Don't need RETAG here. Found by @mrjbq7. Fixes #637.
db, db.sqlite: If we are in a transaction, don't start another transaction. Add a unit test. Fixes #631. Fixes #623.
debugger: Fix error message.