It seems to be different everywhere you go - each country and airport seems to have their own way of doing things. Generally, if travelling internationally, you only get screened when you depart, and you only go through customs once you reach the country of your destination. Anything in the middle is just "in transit". However, I recall having gone through security at Frankfurt, even though I was only passing through it - I needed to to get from one terminal to another, and so I had to go through security again. Most of the time, that doesn't happen though.
In any case, I was on a number of planes over the past few days, and never once did I hear mention of any new regulations, new security measures, or have anyone ask me to take anything off of my lap while in flight. I didn't even know any "incident" had occurred until I got to work this morning and people asked me about my flights and how horrible it must have been with all the new security regulations. lol