Warn user of incorrectly named file extensions

[RegisteredForThis]

IrfanView has a neat feature that it shows you a popup when opening a file that has a wrong file extension, i.e. the extension in the file name is different from the file's actual content, and it also asks you if you want it to rename the extension to the correct one. I think it would be great if XnView also had this feature, instead of leaving the user unknowing when it happens.

Here's a screenshot from the web about said dialog:

[user0]

duplicate

[RegisteredForThis]

Google has failed me. Thanks for linking it!