A friend of mine recently developed some rolls of Tri-X, they all came out clear, no edge numbers or anything. My guess was he fixed before developing. He believes it was because he mixed the pre-packaged developer at 68 degrees(developing temp) instead of heating the water to 120 then mixing. I have a hard time believing this would be the problem as I thought that heating the water was primarily for ease of disolving the developer. Even if it did cause a problem I would have thought at least some developing would occur. I think the developer was Kodak maybe d-76 or dektol.