Stop the Cuts - National Demonstration

It's already come out that the LibDems had decided that if they went in to a coalition with the Tories they would drop their opposition to tuition fees. This was during the election campaign when they were still promising that if they got in they would abolish them.

This sounds about right, put forward what you believe in to the electorate + formulate policy in case of a hung parliament with differing compromises depending on the composition of any future government. All parties do this for every election.

More broadly, how will the LibDems campaign in the next election? Will all of their policies be put forward with the proviso that they will ditch them if they enter a coalition government?

As far as I know they are going to campaign as previously with their own agenda - and, of course, if they end up in a coalition, like any party, they will need to make compromises.