Frogboy mentioned this on another thread. The inflation is by design - researching a tech adds a little to the cost of all other techs. Possibly it's just more visible now because we can see the cost of each tech before researching it.
I was going to mention this as well. I recall something about this being the intended way it should function, though perhaps not so severe. I wish I could experience this bug! I think I'd like it so long as the AI could handle it too. I think research should be a very long and arduous process.