Arsenal have surrendered an early lead to enter the break level with Brighton & Hove Albion in their FA Cup fourth-round tie at the Falmer Stadium.
After an uneventful first quarter-of-an-hour, the game sparked into life with a goalscoring chance at each end.
Ashley Barnes latched onto a long ball and struck low, forcing Wojciech Szczesny to tip the ball around his post.
From the resultant corner, the Gunners counter attacked through Lukas Podolski, whose layoff was emphatically converted into the top corner by Olivier Giroud.
Debutante striker Leonardo Ulloa, who joined the Seagulls in a £2m move from Almeria last week, thought he had marked his Brighton bow with a goal on the half-hour.
He converted Will Buckley's cross from close range, only for the assistant referee to raise his flag for offside.
However, minutes later Brighton did earn parity when Szczesny failed to punch clear David Lopez's corner, allowing Barnes to head home from six yards.