This section quoted from the New York Sun seems rather significant:
In Qom, the theocracy was absorbing the aftershocks of a candid interview from Grand Ayatollah Montazeri, who told an Iraqi news agency that the current Islamic Republic has failed to deliver the democracy it promised in the 1979 revolution.
The stirrings inside Iran are the most serious challenge to befall the mullahs since the protests that accompanied the 2003 commemorations of the July 9, 1999, Tehran University student rebellions. They also suggest the regime that America and Europe are now hoping to cajole into suspending its nuclear program may be more fragile than intelligence agencies recognize.
And there are other incidents listed.
Given that our press has been horrible in reporting on any unrest in Iran, I don't know whether this listing of incidents inside Iran lately is a recent surge or just me noticing what is common.
We may soon see whether Iran is fertile ground for regime change.