I'm using mercurial and MercurialEclipse. I just merged one of my projects and now I have, to the right of the project name in package explorer, "default {up arrow symbol} 2"
At first I thought this meant I had two tips, but looking at it with tortoise or "hg log" it seems to only have the one tip.
What does the up arrow mean?
It means you have 2 local changesets that have not yet been pushed to the central repo. If you synchronize the project (right click on project-->Team-->Synchrozize), or do hg out on the command line, you should see them.