Occasional java.lang.IllegalStateException when navigating between sections of a book

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Start listening to an audio DAISY 2.02 book
2. Use the stroke-up gesture to select the previous section
3. Repeat the stroke-up gesture several times to continue going 'back' through 
the book

What is the expected output? What do you see instead?
The application should keep track of the gestures and allow the user to 
navigate forwards and backwards with any issues. However sometimes (I'm 
guessing at 1 in 4) an exception is thrown in the debugger 
java.lang.IllegalStateException that isn't displayed to the user. The 
application may exit.

Please use labels and text to provide additional information.
This was reported for changes after r142, however it's been happening for a 
while so may be a latent bug that's simply annoying me enough to report it 
finally!

Original issue reported on code.google.com by julianharty on 28 Jun 2010 at 1:53

[GoogleCodeExporter]

I've not encountered this problem in the last few months of development and 
testing and as importantly I think some of the changes I've made to the code 
may well have fixed the underlying issue(s). I'm marking this issue as fixed, 
albeit without specific details of the fix(es).

Original comment by julianharty on 29 Dec 2010 at 12:13

• Changed state: Fixed