My Powerbook looks to be succumbing to the effects of too much travel and a few traumatic drops, that is to say it is freezing from time to time if it is moved. The poor thing has been badly treated and shows the scars. A consequence of this is that I may be out of email contact for a bit while the problem is fixed. It will also mess up some writing and other deadlines so apologies in advance. If you cannot get through then send an email to the general Cognitive Edge contact email address and someone will get a message to me.