I've looked into this also because some of my tomato plants have leaves that tend to curl, and from what I've read the plant is ok, its just something in its genetics.
I just had to add lime to all my Rose tomato plants because they were getting blossom end rot. I seemed to have caught it in time because all new fruits are coming out fine
Now i'm just having to deal with their heights, most of them are above 6' now!