[Rd] dialog box does not go away (PR#9081)

[plorch at kent.edu]

Full_Name: Pat Lorch
Version: Version 2.3.1 (2006-06-01)
OS:  OS X 10.4.7
Submission from: (NULL) (131.123.232.162)


I have noticed that when I save a Quartz graphic and sometimes when I source a
file, the dialog box persists and causes certain functions (Quit and Load/Save
Default Workspace) to be grayed out.  I must then Force quit and I lose changes
made since last save.image().