ZoomBrowser Ex lossless JPEG rotation

[Legion]

I just came across this interesting site where the author states:

I have tested Canon ZoomBrowser EX 5.7 and confirmed that it does in fact perform lossless rotation (if you set the Rotate Actual Images option, otherwise it's a virtual rotation).

I checked this out myself and it's true - rotating JPEG images in ZoomBrowser really is lossless, as long as the Exif data are intact. This also applies if you have the settings defaulted to automatically rotate as you download images from the camera. If the rotation isn't going to be lossless then you get a warning message.

I used to worry for ages that I'd lose quality if the photos were automatically rotated, and so put up with the annoyance of portrait photos appearing on their sides in Windows (which as you probably know, doesn't respect the Exif orientation tag). Seems I was worried for nothing - I'm changing the setting in ZoomBrowser back right now to automatically rotate!
Whether I can be bothered to go back and rotate all those hundreds of old photos is another matter...