they say they have a limited inventory of stocks available for shorting and i need to call in to find out as they can't email it. I work at 9 in the morning so I'm unable to call in on time to find out what's available, do some analysis, and decide what to short.
I trade intraday so often have such problems. There is a list of stocks which are nonshortable (its a dynamic list). But if I want to short stock from this list I must pay additional commission.