This is not a duplicate. This bug was against xubuntu-default-settings, which didn't set the correct default image application handler. Bug #458148 is against thunderbird declaring itself able to open image file whereas it shouldn't.
This is not a duplicate. This bug was against xubuntu- default- settings, which didn't set the correct default image application handler. Bug #458148 is against thunderbird declaring itself able to open image file whereas it shouldn't.