This is an adminstrative code that indicates there is a delay in processing your return.
The reason the agents who answer the phone cannot help you , is that they are information persons only. They can only read what is on the screen infront of them. They are not allowed to comment or speculate on a general code such as this, because the delay can be anything from an IRS log jam of electronically filed returns to some miss match of information on your return or math errors.
It simply means that there is a dealy in processing your return. For now, the general concensus is that it is a log jam of electronically filed returns.