Problem, probably with Lilypondtool

[Nick Payne]

When I use jEdit/Lilypondtool on Linux, about one time in four or five 
that I run Lilypond from the LPT toolbar, Lilypondtool doesn't recognise 
when Lilypond has finished processing, doesn't return with the "Lilypond 
ready" prompt in the console window after the PDf has been generated, 
and the updated output doesn't appear in the PDF preview window, though 
I can open the newly created PDF in Evince. I have to click the "Stop" 
button in the console window toolbar to get processing to stop and the 
PDF preview to refresh. I've had the problem with several different 
versions of Lilypond, with both jEdit 4.3pre17 and 4.3pre18, and on both 
32-bit and 64-bit Ubuntu. I have never seen the same problem when using 
LP and LPT on Windows.

Nick