The front man has sent a message to the ACDC web site explaining the medical issue that forced the band to delay the start of the next leg of the Black Ice world tour (story).  Johnson says his vocal pipes are are good to go, but the plumbing in his abdomen is causing him "...lots of trouble, ulcers and such."  His post indicates that doctors have ruled out anything that would prevent him from resuming the tour, but advised him to take some additional down time before getting started.  The tour, which had been scheduled to start this week, will instead get back in gear October 16 in Washington, DC. 
ACDC.com

MORE ACDC INSIGHTS