Arsenal have been victims of swift counter attacks from Everton, Manchester United and Chelsea in recent weeks, but this time the boot was on the other foot as Arshavin led the charge from a Porto corner to play in Eboue, who rounded Helton to score.
Schifcofske each time kept up his record with the bootbut Rovers hit back again when Galea drove over from a couple of yards and Dobson's fourth conversion levelled the match.
Smith was also causing problems, jinking between two Wolves defenders before squaring for Dindane, but his first-time poke with the outside of his right boot was pushed away by Hennessey and Smith smashed his follow-up from an acute angle wide.
Derry suffered a nervous moment four minutes from time when Ken Oman allowed an innocuous ball to slip under his bootbut keeper Forde reacted quickly to clear to safety.