When a federal judge in Alabama overturned a ruling by a bankruptcy judge there last month, lawyers at the firm that used to be Powell Goldstein got dragged back into a complicated and increasingly hard-fought malpractice battle launched against them by the bankruptcy trustee for a former client.

PoGo, which this year became part of Bryan Cave, had represented Verilink Inc., a Huntsville, Ala.-based telecommunications parts maker, in what turned out to be a financially disastrous acquisition of another company.