Rambler, a Russian company, has filed a copyright claim against Nginx, a web server software, and its creator Igor Sysoev, alleging that the software was developed while Sysoev was an employee of Rambler. The claim has led to a police raid on the Nginx office. Rambler is seeking 51 million rubles (approximately $810,000 USD) in damages. The case has sparked concerns about the ownership and licensing of open-source software.