CSX Corp., Jacksonville, Fla., will face a shareholder proposal tomorrow, for the third year in a row, requiring the company's poison pill anti-takeover devices to receive shareholder approval. The proposal received 74% of the vote in 2003 and 62% in favor in 2002. The board opposes the proposal, noting that it terminated its poison pill last fall but wants the flexibility to reinstate it at will. The $167 billion California Public Employees' Retirement System, Sacramento, supports the proposal. Also, CalPERS is withholding votes for the re-election of five of the 11 directors, in part for authorizing auditor Ernst & Young to provide non-audit services or for potential conflicts of interest.