Officials have been forced to move the running rail at Cranbourne to allow the race meeting to go ahead.
Jockeys walking the track before Thursday's first race found holes where the running rail was positioned at the last meeting.
Racing Victoria steward Wade Hadley said several jockeys had spotted a patch about three metres off the rail which they didn't think was safe.
The meeting was delayed 90 minutes while the rail was moved out three metres from the 1000m mark to the winning post.
G3 - The Majordomo Hospitality Handicap Steeple Chase
G2 - Prix Raoul Balliere
G2 - Prix Ariste Hemard
G3 - Victress Stakes
G2 - Premier Trophy