While there's no evidence of a split, the Irish Minister for Justice (Alan Shatter) is taking a slightly different approach and has criticized the flotilla, saying that he doesn't see the need for it. Please note that Gilmore did also praise Israel's plans to let in construction materials into Gaza. This new government is taking a more balanced approach vis-a-vis Israeli concerns than the previous government.
4.2-scale earthquake felt in Dead Sea, Jerusalem area (Haaretz)
from the article: Ireland FM warns Israel against violent interception of Gaza flotilla