Liberty DeVitto, former drummer for Billy Joel, is suing Joel for unpaid royalties. I love a lot of Joel's work from the 1970s and '80s, and DeVitto was an important element of it.
I don't know the grounds for DeVitto's suit, but Terry Teachout noted a couple of years ago that the definition of intellectual property is changing. For instance,
[In December 2006] a London judge awarded 40% of the copyright of Procol Harum's "A Whiter Shade of Pale" to Matthew Fisher, the group's ex-organist. Mr. Fisher, who had asked for 50%, doesn't claim to have written the song, but he did write the Bach-like organ countermelody heard on the group's 1967 recording of "A Whiter Shade of Pale," which sold 10 million copies. Judge William Blackburne called the countermelody "a distinctive and significant contribution to the overall composition and, quite obviously, the product of skill and labor on the part of the person who created it."
By that standard DeVitto may be entitled to some of Joel's profits. DeVitto's playing on "Just The Way You Are," for instance, helped keep the track from sagging into sappiness (to my ears). With a lesser drummer it might've been a lesser hit, or no hit. He gave similarly inventive, flavorful performances on other songs ("Only The Good Die Young," also from The Stranger, comes first to mind).
Anyway, sad to see a musical partnership and friendship wind up in lawyers' hands. Hardly unprecedented, but sad.