Facebook (NASDAQ:

) investors and Nasdaq OMX Group (NASDAQ:

) have requested that a judicial panel separate their dispute from the dozens of other shareholder lawsuits relating to the social network's IPO.

According to

, investors first sued Nasdaq OMX Group for "negligently handling their orders for Facebook shares." Reuters quoted the investors, who said, "When compared to the Nasdaq actions, the securities actions allege different claims based on different facts against different defendants on behalf of broader classes and are subject to different and unique pretrial procedures." Goldman Sachs (NYSE:

), J.P. Morgan Chase (NYSE:

), and Morgan Stanley (NYSE:

) -- Facebook's lead underwriters

-- wanted the lawsuits

to be grouped together. These are not the only lawsuits Facebook has encountered this year. In March, the social media giant was sued by Yahoo! (NASDAQ:

) for

. Last month, Facebook paid $20 million to settle a "Sponsored Stories" dispute that

. In addition to its lawsuits, Facebook has been struggling to maintain its position as a primary avenue for advertisers looking to hype new products and services. Ford (NYSE:

) and Coca-Cola (NYSE:

)

to the company; General Motors (NYSE:

)

.