bug#2153: 23.0.90; NS: Hang with do-applescript

[Adrian Robert]

This likely indicates a problem with the ns-do-applescript  
implementation when modal dialogs are presented.

A work-around for the particular case is to use ns-open-file.

I believe the purpose for ns-do-applescript was to send outgoing  
Applescript to other applications, so I'm unsure how important the  
general use-case is, but in any case the bug should be fixed or the  
ns-do-applescript function removed or disabled.