From 3 June to 31 August the evening service between Rosslare and Dublin is defered to 18.35 Monday-Sunday to connect with the ferry. However regular customers on the 17.36 ex Connolly won't be to pleased with a long wait in Gorey.
http://www.irishrail.ie/media/08_-_d....pdf?v=ga4dkqy
Guessing haveing it 40 minutes earlier than last summer is to keep costs the same all year round?