Xneur crashes when using virtual keyboard

Cannot confirm on Gentoo with xneur-0.15.0 and matchboard-keyboard-0.1.
Please:
1. Attach full log with (Trace log option enabled on config)
2. Attach xneurrc config file
3. Attach backtrace of crash
4. Write you distribution and xneur, matchbox-keyboard versions

xUbuntu 12.04 (xfce 4.10), xneur 0.15.0, matchboard-keyboard-0.1. X.Org X Server 1.11.3

Don't see program crashes in your log and no backtrace was provided. Ok. Lets try to locate error.
Please do the following actions.

1. Install xneur-debug and gdb:
apt-get install xneur-dbg gdb
2. Run xneur wit logging:
xneur &> xneur.log
3. Use russian language first. Write by hardware keyboard (if you can use that kind of keyboard):
привет + Space
4. Continue writing in russian layout but in virtual keyboard:
цщкдв + Space
5. Attach full log. Ok, if program will be crashed on step 4.
6. Run xneur in GDB:
gdb xneur
write down: r + enter
7. Press virtual keys to make xneur crash
8. Return to the gdb. You can see that GDB will be stopped. Write:
thread apply all bt
9. GDB may ask your to press some keys to scroll down the baktrace. Attach the whole backtrace info with the type of error (info when GDB will be stopped immediately after xneur crash).

GDB don't stop automatically. I think that xNeur restarts or i doing something wrong.

Ok. So why do you think the program was crashed?
Anyway, please, do the stps 2-5. They must work in any case.

At laeast crashes gXneur: tray icon disappears and then shows again. In top i can see that XNeur and gXneur using CPU so high.

I think that xneur crashes here:
a[TRA] 00:08:48 Получено MappingNotify (тип события 34)
[DBG] 00:08:48 Текущие данные строки очищены
[DBG] 00:08:48 Используется локаль ru_RU.UTF-8
[DBG] 00:08:48 Теперь раскладок 1
[TRA] 00:09:02 Получено MappingNotify (тип события 34)
[DBG] 00:09:02 Текущие данные строки очищены
[DBG] 00:09:03 Используется локаль ru_RU.UTF-8
[DBG] 00:09:03 Теперь раскладок 2
a[TRA] 00:09:11 Получено MappingNotify (тип события 34)
[DBG] 00:09:11 Текущие данные строки очищены
[DBG] 00:09:12 Используется локаль ru_RU.UTF-8
[DBG] 00:09:12 Теперь раскладок 1

(Any line that starts with "a" it's a pressing english "a" on virtual keyboard. I know that it is not trace, but how programmer i think that place with error can help you.

Ok. Seems crashes only gXneur, not XNeur, due to the process id wasn't changed (see you attached log). And reloading configuration (see in log file) said about GXneur restarting.
Your log in comment don't say about crash. Seems when you press virtual key it handle only 1 layout (you use in virtual keyabord). And this situation may confuse GXneur and make its crash.
Lets confirm this.
1. Change debugging to gxneur. Close all running GXneurs. Start from terminal:
gdb gxneur
2. Print: r + enter
3. Press any virtual key
4. Change focus to terminal, when GDB was started and:
thread apply all bt
5. Attach backtrace

Then. Close all XNeur and GXneur instances. Run XNuer from terminal:
1. xneur
2. Change focus to text editor or smth else.
3. Write with virtual keyboard words to force change layout. For example: привет цщкдв печатать
4. Ensure that XNeur works. The printed text above should be: привет world печатать

GDB don't stop. I see this:
[Thread 0xb6ce8840 (LWP 2105) exited]
[Thread 0xb64fbb40 (LWP 2110) exited]
[Inferior 1 (process 2105) exited normally]
(gdb) bИспользуется libxnconfig API версии 0.15.0 (собрано с 0.15.0)
And gxneur (or xneur) restarts infinitely.

xNeur (just it, without gXneur) with onboard do all what i wrote earlier. Maybe dont crash, but uses CPU so high when i press buttons on onboard.

Today apport wrote crash file. Maybe it can help you.

Xneur crash backtrace extracted from user's coredump