How Does A Proposal Fail 99-0?

I subscribe to "Megavote" emails from Congress.org that inform me periodically of how my Senate and House representatives have voted on legislation.  Most of the time, it's interesting to see how many Senate filibuster cloture votes have failed to end debate on bills the Republican minority oppose.  Recently, however, I came across an unusually peculiar item:

“Obama” Budget Resolution - Vote Rejected (0-99, 1 Not Voting)

The Senate unanimously rejected this budget resolution, which was the GOP’s interpretation of President Obama’s FY 13 budget proposal. It would set new FY 2013 budget authority at $2.982 trillion. This marks the second time Senate Republicans have introduced what they call the president’s budget for a floor vote, and the second time the proposal has failed to garner a single “yea” vote. This was the first of five budget resolutions the Senate voted on last week, each one a “messaging” vote since both chambers have already set spending levels for their respective FY 13 appropriations bills.

So I'm guessing that even the mope who submitted this bill didn't vote for it?  Why would "Senate Republicans" even introduce something so toxic for a floor vote? What possible political benefit is attributable to proposal that not a single Senator votes for?  What is the "message" the Republicants are sending?

We are truly in Alice's Wonderland.