FreeFileSync Forum

I'm running v7.6 on Debian Linux testing.
uname -a:
Linux mjdtjm-laptop 4.2.0-1-amd64 #1 SMP Debian 4.2.3-2 (2015-10-14) x86_64 GNU/Linux

Syncing my laptop with ext HDD, and after closing FFS window, it says:
(FreeFileSync:3880): CRITICAL : murrine_style_draw_box: assertion 'width >= -1' failed

Hi and thank you for your great job!
Where can I download a Debian package of it?