Loss of image quality after rotate canvas

PS7 on Win XP
Windows Explorer and some software bundled with digital cameras [Canon and Panasonic] warn when rotating a picture that there may be loss of image quality. Presumably it must re-compress the jpg image file?
In order to avoid that problem, I have been rotating image files in PS7, since no such warning comes up there.
Is there loss of image quality by rotating or cropping in PS7? I usually save jpg files at quality level 10.
TIA
Bruce

Have seen this posted several months back. Try a search to see if you can dredge up this issue. If not successful, come back and someone with more memory cells than I can answer it.

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