While acknowledging some claims of petition fraud, the GAB has certified all three Democratic recalls. Hard to say serious the fraud was -- the stories are unclear, but at first glance, it doesn't seem that serious.
Long-time Republicans are running in the Democratic primaries (for the Republican held senate seats) as spoilers, apparently hoping to give the Republican candidates more time to fundraise (and I would bet, also to push the election to the less hospitable grounds of August). Some commentators are getting worked up by this tactic, but spoiler candidates are nothing new. However, the Democrats are right to hammer away here (from a tactical point of view). Allegations of unfair play and underhanded tactics will undermine the Republicans claims against the recall and benefit the party. As such, the blatant use of spoiler candidates could be a poor decision.
The Republicans may also be shooting themselves in the foot by having every race have a primary. As I mentioned, it may be beneficial for the Republicans to have two separate votes -- the first being recalls of Republicans, the other a month later being the Democratic recalls. Apparently, the Republicans disagree.