When using the "%(prompt)" escape sequence as part of a build command (ctrl-m) the focus switches to the build window after the prompt value is supplied. As a result, hitting ctrl-shift-down/next-error does nothing - I have to switch the focus back to the edit buffer (or hit escape) for next-error to work correctly. Without the prompt escape the next-error command works immediately following a build as expected.
Regards,
Iker