Howard Wilson, a long-time Libertarian Party activist in New Hampshire, has this op-ed in the Monitor, the daily newspaper of Concord, New Hampshire. Wilson points out that some of the Republican Party officials who are criticizing the state chair of the Republican Party for signing a Libertarian Party ballot access petition, themselves signed petitions to put Libertarians on the 2010 ballot. The op-ed is also interesting for its details about petitioning in New Hampshire.
In New Hampshire, only a single petition is permitted on any particular petition sheet. This explains what is meant when Wilson says the petition was returned to the Republican Party state chair. It is a way for him to have withdrawn his signature.