OK, sorry for all of this. It would appear that the problem may have been that Evolution was NOT actually selected within Preferred Applications. Instead "Custom" was selected, and Evolution was the default. Now that Evolution is actually selected, it works just fine sending pictures. Well, that's as much as my sleep-deprived brain can deduce.
OK, sorry for all of this. It would appear that the problem may have been that Evolution was NOT actually selected within Preferred Applications. Instead "Custom" was selected, and Evolution was the default. Now that Evolution is actually selected, it works just fine sending pictures. Well, that's as much as my sleep-deprived brain can deduce.