Goalkeeping errors by Jake Cole gifted Shrewsbury two goals in three minutes as Barnet were beaten 2-1.
Cole made a brilliant point-blank save from Matt Harrold's header after half-an-hour but eight minutes later dropped a shot from Mark Wright to give Craig Disley an easy chance from six yards.
Then Cole was slow to get to a centre from Jake Robinson and Harrold had time to turn and fire in from six yards.
But Barnet, with only one away point this season, launched a second-half fightback.
The lively Mark Marshall had goalkeeper Chris Neal at full stretch then a flowing move ended with a crisp finish by left-back Jordan Parkes after 62 minutes.
As Barnet pressed for the equaliser Shrewsbury had a golden chance in stoppage time but with only Cole between three Shrewsbury players and the third goal the Bees keeper made amends by saving from Bolton Wanderers loanee Tope Obadeyi.
Copyright (c) PA Sport 2009, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms