Which is exactly why it is unlikely that Musharaff ordered this.  He seems to be savvy at managing angry pockets of his constituency.  The careful dance of allowing Bhutto back into country, negotiating terms/charges, etc, could have very easily gone awry.  If anything I think Pervez has been trying to avoid this very thing and was actually protecting Bhutto as much as he could.  The man doesn't rule with an iron fist, Pakistan is largely run locally as far as I can tell.