frequent crashes and delete problems

[LHOOQ]

Hi, i'm using XnView since a quite long time, I appreciated your work and iked it a lot, previously on Windows 7 and now that i switched to Ubuntu I'm running XnViewMP 0.68 on Ubuntu 14.04.
The main problem is the program random crashes every now and then with no apparent reason.
another thing that's annoyng is that if i run it from terminal WITHOUT sudo permission, I can't delete images by pressing canc: the windows asking somethin like "you really want to delete?" appears, I press yess, but when I return to catalogator/reopen the program/check the file throu nautilus they are still there, uncancelled.
No problem deleting files if i run in a terminal "sudo xnview", but with sudo xxnview open with a different layout, less classy and uglier.
Hope you could understand
thenks

[xnview]

The main problem is the program random crashes every now and then with no apparent reason.

when using browser?

another thing that's annoyng is that if i run it from terminal WITHOUT sudo permission, I can't delete images by pressing canc: the windows asking somethin like "you really want to delete?" appears, I press yess, but when I return to catalogator/reopen the program/check the file throu nautilus they are still there, uncancelled.
No problem deleting files if i run in a terminal "sudo xnview", but with sudo xxnview open with a different layout, less classy and uglier.
Hope you could understand
thenks

and files are own by the current user account?

[LHOOQ]

when using browser?

yes, mainly when in browser mode

and files are own by the current user account?

yes, i'm the only user and administrator account. although, if this can help, most of the image files are on a different disk partition (which is correctly mounted on startup)

[m.Th.]

1. The program shows a message or something else before it dies or just disappears?

2. Perhaps you have another process (antivirus?) which locks (or do anything else with) the files?

[m.Th.]

...another questions:

3. What XnView MP do you have? 32bit or 64bit?

4. How many files do you 'see' in the Browser pane at once when it crashes? 10? 100? 500? 1000?

5. Can you monitor the memory consumption of the process?