Suppose there is an open window.
Open a macroman file, don't convert, cancel.
A second alert will say can't open.
This second alert can't be dismissed with Return.
In fact the return presses are sent to the
open window. (Well, they are only inserted into
the open window once the alert is dismissed with
the mouse.)
Good catch !
This is fixed now.
Changes committed to the repository (rev. 1302). The core must be rebuilt.