Competition from DVD-by-mail company Netflix Inc. and DVD vending machines operated by Coinstar Inc. have eroded the Dallas company's revenue even as it staggers under a heavy debt load.
Blockbuster Inc. said in a regulatory filing late Tuesday that it was suffering "significant liquidity constraints," and could have to file for bankruptcy protection if it was unable to convince creditors to restructure a big chunk of its debt or its business continued to deteriorate.
