As far as I can tell, there has been nothing else to suggest that there is any truth to the rumor. Pajamasmedia has a report up that gives some information:
http://pajamasmedia.com/2007/11/uncertainty_and_fear_in_pakist.php
No hint of anything about Musharraf under house arrest.
Lawyers Beaten, Arrested At Pakistani Protests
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police beat and arrested lawyers protesting the emergency rule of Pervez Musharraf in Islamabad today. The Islamist party leader Liaqat Baloch estimates that 500 members have been imprisoned, a fate he narrowly avoided by fleeing Lahore:
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Despite the obvious preparation Musharraf made in issuing the emergency order, the disorder has prompted some chaos. Musharraf himself became the object of a rumor that he had been deposed in a countercoup. He spoke with Reuters at the presidential building to laugh off the suggestion:
But rumours in several Pakistani cities this morning suggested he had been detained by members of his own staff angry at the clampdown.Gen Musharraf quickly laughed off the suggestions. "It is a joke of the highest order," he told the Reuters news agency from the Presidency building in Islamabad today.
The West appeared slow to respond on Saturday, but amplified their criticism yesterday. Both the US and the UK announced publicly that aid to Pakistan would come under review, a warning that cash and other aid would shortly stop. Condoleezza Rice demanded a return to democratic processes and elections, but also said that counterterrorism remained a high priority.
The situation has turned ugly, and perhaps the best one can hope to see is the war against the Islamists turn serious in the border provinces. Unfortunately, Musharraf has probably enhanced the Islamists' credibility in his seizure of power and elimination of the independent judiciary. He may have thrown gasoline on a fire already out of his control, gambling that putting the military in firm control of the political process will lead to a stronger fight against the rebels. He might laugh off coup rumors at the moment, but I doubt he'll sleep easily at night for a long time.