Rovers compound Wenger's woes
Arsenal disintegrated in a second-half collapse to lose 4-3 against Blackburn and leave Arsene Wenger facing more questions.
Two own-goals, by Alex Song and Laurent Koscielny, plus two Yakubu strikes on his debut, handed victory to Blackburn who at half-time had been staring a damaging defeat of their own in the face.
Gervinho and Mikel Arteta had earlier both scored their first goals for the Gunners to secure a lead at the break. Marouane Chamakh headed a late third for the Gunners to make it a nervy last five minutes but Blackburn held out.
Arsenal had given Rovers boss Steve Kean just the start he must have feared when Gervinho broke his duck for the Gunners in the 10th minute, running onto Song's peach of a through-pass.
Gervinho then wasted two more chances to extend the lead and Rovers made the Gunners regret such largesse when Yakubu brought the scores level with the neatest of finishes.
Ten minutes before the break a patient Arsenal build-up led to an incisive move that saw Arsenal regain the lead courtesy of Arteta's first goal for the north Londoners.
Blackburn began the second half with obvious urgency and levelled when Ruben Rochina floated in a free-kick which bounced off Song's knee and into the net.
Fired up by the equaliser Rovers went on a series of offensives, ending with Yakubu putting the home side ahead for the first time from close range.
Blackburn struck again via another own goal as Martin Olsson's cross was deflected past Wojciech Szczesny by Koscielny.
Substitute Chamakh planted a header in the top corner with five minutes remaining but it was not enough.