The Webb amendment about the scheduling of troop deployments has failed 56-41; it needed a 3/5 majority. The 60-vote requirement for amendments to the Iraq funding bill has complicated Senate wrangling over the matter.
UPDATE: Seven R's voted in favor of the Webb amendment; according to the Washington Post, R supporters are

Hagel [(NE)], Snowe [(ME)], and Sens. Norm Coleman (Minn.), Susan Collins (Maine), Gordon Smith (Ore.), John Sununu (N.H.) and John Warner (Va.).

UPDATE: In other amendment news, Sen. Snowe (R-ME) is now a co-sponsor of the Levin-Reed troop withdrawal amendment. She had seemed leaning in the direction of this proposal yesterday.