Found this at edmunds.com, same problem....

Last week, my 2003 (manual)civic hybrid started hesitating during accelaration, especially in the lower gears -- sort of a shuddering... then my IMA light went on, then my SRS light, and my emergency brake light -- I brought it into the dealer, they recharged the battery pack, said I was all set. Drove it for a day, it started bucking again and then the IMA light went on again -- brought it in, they had it for two days and now they say they "think" it is the ABS which is somehow related to the IMA? and they need to order the part, which by the way is $900 bucks. Said they didn't know if that would solve the problem but the computer codes indicated that the ABS was a likely candidate. But my ABS light never came on. I have 84,000 miles on this car and at this point I just want to sell it. Any advice?