Photo appears in forum posts upside down...

[probably chalk]

...even if I create a new file with the photo upside down in the first place...

[The Rotrex Kid]

It’s a weird (normally iPhone) thing with Thumbsnap I think.

[probably chalk]

The Rotrex Kid said:

It’s a weird (normally iPhone) thing with Thumbsnap I think.

Thank you. PC in this instance though.

[Mr Pointy]

Try opening the picture in Irfanview (or maybe GIMP) & reset the EXIF data.