"launch document" synchronous on Linux only?

[Richard Gaskin]

I've somehow never noticed that on Linux the "launch document" command 
behaves synchronously, while it's not synchronous on Mac or IIRC on Windows.

This winds up being especially bad for RunRev:  you can't use the IDE 
after choosing Help->User Guide.

I've filed a bug report for the IDE issue:
<http://quality.runrev.com/show_bug.cgi?id=10649>

Before I file a report on "launch document" itself I wanted to check to 
see if any of you folks can think of a reason why this should be 
synchronous, and if you know enough about GTK to point me to the API 
which could be used for asynchronous launch.

TIA -

-- 
  Richard Gaskin
  Fourth World Systems
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