Earlier today while exploring the sewers, I noticed something odd.

I had should have had +19 to saves against disease from various gear + my fort save, however I noticed that my save rolls only included my base fort save and weren't including any of the + save vs disease gear.

Much sadness. And I worry that it may effect other things... Like the +save vs death or poison gear I have for occasions.

Heeelp

Try re equipping said gear that gives these saves.

Do you have multiple +fort and multiple +save items? It may be that only one +fort and one +save is being counted, providing the same value as if only all +fort were counted?

That's an odd bug, I can rightfully say that my disease save was working properly when I travelled the sewers...

ascott: I have a total of one item with +1 fort and a host of other items that range from +2 to +4 to disease. The only thing that was being counted was the +1 fort. All else was ignored.

Perhaps I can get someone to test it with me? Someone who can cast a disease spell?

Having equiped multiple + save vs. Disease items, everything seems to be working the way it should for me (vs. Rats). Perhaps it was lag related?

Relinquish had it, I think, there is a problem with sometimes, when you un-polymorph/wildshape/whatever, you see your gear places in the proper slot but in truth, it isn't there at all, I think this mostly occurs if you die/rest/log while in wildshape.

As was said, re-equipping everything is an easy way to fix it. Why, I did it every time I changed back to my regular form, just to be safe.