The prosecution of former FBI Director James Comey hit another hurdle Wednesday as the Justice Department acknowledged a possible lapse in how the case was presented to a federal grand jury for indictment.

The concession risked further imperiling a politically charged prosecution already subject to multiple challenges and demands for its dismissal. It came during a hearing in which Comey’s lawyers asked U.S. District Judge Michael Nachmanoff to throw out the case on grounds that the government was being vindictive. A separate challenge to Lindsey Halligan, the hastily appointed and inexperienced prosecutor who secured the indictment, is pending.

The issue was not caused, directly or indirectly, by a cyber attack or malicious activity of any kind. Instead, it was triggered by a change to one of our database systems’ permissions which caused the database to output multiple entries into a “feature file” used by our Bot Management system. That feature file, in turn, doubled in size. The larger-than-expected feature file was then propagated to all the machines that make up our network.

The software running on these machines to route traffic across our network reads this feature file to keep our Bot Management system up to date with ever changing threats. The software had a limit on the size of the feature file that was below its doubled size. That caused the software to fail.

Apple today challenged the funding behind a $4 billion UK lawsuit during a tribunal hearing, raising new concerns about the iCloud class action as the company battles further antitrust scrutiny.

The case was initiated by consumer group Which on behalf of consumers, alleging that Apple’s iCloud storage practices lock users into the service and cause them to pay more for cloud storage than they would have paid under more competitive conditions. Which is seeking compensation and an injunction to prevent Apple from continuing the alleged conduct.