Shorts have also being going up, unusual for a stock under $5, since only "professionals" are typically allowed to short non marginable stock, indicating to me the shorts may also know something...
Ze'ev.... I'm not sure what you mean by "professionals", but I short sub-$5.00 stocks all day, every day. Just a matter of having the right brokers (Fidelity, Harris and Interactivebrokers are best).