Before the usual roomers and panic begin to spread around, here is what happened yesterday (source various Egyptian media reports and Al-Jazeera)
Yesterday, there was a big rally in Tahrir Square as usual on Fridays. This week, the focus was on demanding a quick trial to the deposed president. At the end of the day, a number of protestors (a few hundreds) decided to defy the curfew and spend the night at the square. At 3 AM, one hour into the curfew, the military police forces moved into the square, evacuated it by force and chased protestors away. Gunshots were fired in the air and tear gas was reportedly used. A little while later, after the square was cleared, protestors tried to regroup themselves into the square again and the military police responded in the same way.
About two hours later, after curfew hours ended, the military and police forces withdrew from the square and protestors began to enter again. During that, an empty civilian bus and a parked military vehicle were set alight in the middle of the square. Smoke was seen rising especially from the bus after sunrise on Saturday. Returning protestors managed to block the entrances to the square and are currently occupying it. There are no army or police soldiers in sight.
During the overnight events, 50 people were detained by the army. There are reports of casualties, but nothing confirmed yet. There is a report of two deaths and another of numerous minor injuries only.
The military will hold a press conference in the next few hours to clarify what happened. However, the military issued a statement earlier this morning accusing one of the allegedly corrupt businessmen (a friend of Mubarak's son) of sponsoring those who tried to defy the curfew in order to ruin the relations between the army and the people. An arrest warrant has been issued for that businessman and three of his associates. On the other hand, all political groups insisted they had asked their supporters to leave the square before the curfew and they had no plans of keeping anybody there after 2 AM. All groups disassociated themselves from those who defied the curfew.
Conclusion: I am monitoring the situation closely, but so far, there is no evidence to suggest that what happened last night was the beginning of any continuing unrest. Therefore, Cairo and Tahrir Square remain a safe place to visit and you are still encouraged and welcomed to join any of the Friday rallies there, but as I said before, you must respect the curfew. During the three curfew hours, you can only move for urgent reasons (catching a flight, arriving from abroad or going to hospital) and you must have a photo ID on you. As for protests, no matter how attractive the idea may seem to be, never venture into a protest during curfew hours (even for curiosity) coz the two times protestors tried to defy the curfew after the revolution, it didn't go down well with the army at all and the result was a violent clash!