Other than their being targeted at certain points...and what I mean by that is the targeting of reporters in Tahrir, where they're in a very volatile situation.... The same, I have to say, is true of anyone who looks foreign. Even though I'm Egyptian, because of my demeanour and having grown up and been abroad most of my life, everyone just assumes, until I start speaking in Arabic, that I'm a foreigner and would treat me thus.
Foreigners do have some issues, but walking around outside these flash zones, I think, is pretty safe. There have been cases of abduction in the Sinai, but this isn't new; these incidents have happened throughout the last two decades, but have returned. This is more an issue of a Bedouin-to-state negotiations than specific attacks on foreigners.
Other than the cases of rape that happened in Tahrir, outside the context of those very volatile areas, there haven't been too many attacks on foreigners.