Image darker in Photoshop than in other programs

[John_den_Heyer@adobeforums.com]

(Mac G4/OS 10.2.6/ Photoshop 7.0.1)
I have an image that looks different in Photoshop and other imageviewers, browsers etc. Never had this before.
The image is darker in Photoshop than in other programs.
Don't understand but I can't work like this. Never had this before.
I tried to flatten the image and save it as JPG PICT TIFF etc.
Also changed resolution to 72dpi. Nothing works. The image is still darker in Photoshop than in other programs.
I don't use any color profile. I worked with Photoshop since 1988. This is the first time this happens.
Can anyone tell me what could cause this difference in color.
Thank you.

John dh

[john_findley@adobeforums.com]

Maybe it's something to do with your Proof Setup?

[g_ballard@adobeforums.com]

<http://www.gballard.net/nca.html#coloronlylooksbadinphotoshop>

[James_Earl_Jones@adobeforums.com]

thanks g.....