[Bug 51095] Re: different behavoir based on existence of .jpg extension

[Gary Coady]

You can get the behaviour you want by selecting "Determine image type
from content (slower)" in gthumb preferences. The default is for this
not to be checked, as it would be a lot slower showing directories with
large numbers of images.

** Changed in: gthumb (Ubuntu)
       Status: Unconfirmed => Rejected

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different behavoir based on existence of .jpg extension
https://launchpad.net/bugs/51095