The paper's editorial staff is saying that it has been delayed but will be available by this evening.
It seems censorship/delays are on the rise in the wake of last week - with the Brotherhood's site only intermittently available and the Kifaya site down.
Updates to follow.
I spoke to Abd al-Halim Qandil and there appears to have been a problem with al-`Arabi's computers rather than a censorship issue.
Yesterday was a slightly paranoid day for censorship. But…one has that in such a climate.
Apologies for jumping to conclusions.