Don't worry about the IRS/ Go after your money/paychecks! I am not familiar with the details, though if they are operating under Chapter 11 reorganization it gets the creditors off their back but they are required to meet current expenses; that includes payroll! I was in a similar spot once with an aviation company. I discovered later, the jerks hired me with no intention of paying me, a chapter 11 deal... I found out months later that I was the only person, out of about a hundred, who got paid! About three days after payday, I went to the office with my best "don't screw with me" look and demanded my check. After listening to their BS for a few minutes I again demanded my pay and informed them that it was about to get real ugly if I didn't leave shortly with my pay. They cut my check and I was in the bank in less than 10 minutes hammering it.
Please don't wait around for your pay. Go after it with the fangs out, and now!