Mercurial/Intellij9 hg4idea Error: cannot update with applied MQ patches, please use rebase

I am getting the following error when trying to update my project from Intellij 9 using hg4idea:

Error: cannot update with applied MQ patches, please use rebase

What does this mean? I have not created or applied any patches as far as I know. I can pull changes from my remote repository but cannot update the project from 开发者_如何学Pythonwithin Intellij. I can call hg update from the command line and that works fine.

Thanks

---

It's a known issue of the hg4idea plug-in. The author suggests the following workaround:

Enable mq extension in your .hgrc:

[extensions]
hgext.mq =