I've been developing sheet films for some time . I have used Tmax 400, Tri-x, FP 4 etc. for years. Lately I decided to try Tmax 100. The films have a distinct gr een cast when developed. I have not seen this problem with roll film or any othe r sheet film I use. I use the same chemistry - pre wet, Xtol, Kodak Indicator St op Bath, Ilford Universal Fixer, rinse, Kodak Hypo Clearing Agent, wash & Photo Flo. Has anyone else seen this? Is it a problem?