Ghtumb package in Ubuntu 12.04 LTS is very old (ver. 2.14) while latest upstream version is 3.1.2 - please install latest Ghtumb 3.1.2 package from webupd8team repository ppa:webupd8team/gthumb (https://launchpad.net/~webupd8team/+archive/gthumb ), check if crash still persist and write comment here :)
Ghtumb package in Ubuntu 12.04 LTS is very old (ver. 2.14) while latest upstream version is 3.1.2 - please install latest Ghtumb 3.1.2 package from webupd8team repository ppa:webupd8team /gthumb (https:/ /launchpad. net/~webupd8tea m/+archive/ gthumb ), check if crash still persist and write comment here :)