Today in the Senedd Peter Black called on the Assembly to reverse its decision to scrap the tuition fees grant.
Only two Plaid AMs voted in favour of Mr. Black's proposal. (No prizes for guessing who they were!)
This goes against what the party's membership had hoped for and asks more questions of Plaid's role in government.
"Compromise" and "pragmatism" - those are the two words Plaid's Chairman, John Dixon has consistently used in debates on this issue. "Propping up a Labour government" is the counter-argument.
Here's Kirsty Williams' response to today's vote:
"We proposed this motion today because we believe access to education is a principle worth fighting for. We know that many Plaid Cymru Assembly Members feel the same and that their supporters voted for them because they promised and end to top-up fees.
"Today was a chance for redemption, for Plaid to say sorry and back Welsh students. Instead they chose to play the poodle, to climb so far into bed with Labour that you wouldn't know there's two different parties playing under the sheets."
Here's what one of the Plaid rebels*, Bethan Jenkins, has to say on the matter:
"I recognise that being in government means making difficult decisions. Although I can see where the Government is coming from in this decision to an extent, I can’t support the ending of the tuition fee grant.
"While I understand that the majority of my fellow Plaid members will accept the constraints, and the need to compromise that comes with being a party in government, I am grateful that the group understands my position and have accepted that two of us will be voting differently on this occasion."
*Is it fair to call a politician who sticks to the party's manifesto and election commitments a rebel? Just a thought.
Picture used courtesy of Contadini @ http://www.flickr.com/photos/92305862@N00/422417777/