2 examples I noticed where with the Eggplant theme and the Dot Luv

http://jqueryui.com/themeroller/#ffDefault=Lucida+Grande,+Lucida+Sans,+Arial,+sans-serif&fwDefault=bold&fsDefault=1.1em&cornerRadius=6px&bgColorHeader=30273a&bgTextureHeader=03_highlight_soft.png&bgImgOpacityHeader=25&borderColorHeader=231d2b&fcHeader=ffffff&iconColorHeader=a8a3ae&bgColorContent=3d3644&bgTextureContent=12_gloss_wave.png&bgImgOpacityContent=30&borderColorContent=7e7783&fcContent=ffffff&iconColorContent=ffffff&bgColorDefault=dcd9de&bgTextureDefault=03_highlight_soft.png&bgImgOpacityDefault=100&borderColorDefault=dcd9de&fcDefault=665874&iconColorDefault=8d78a5&bgColorHover=eae6ea&bgTextureHover=03_highlight_soft.png&bgImgOpacityHover=100&borderColorHover=d1c5d8&fcHover=734d99&iconColorHover=734d99&bgColorActive=5f5964&bgTextureActive=03_highlight_soft.png&bgImgOpacityActive=45&borderColorActive=7e7783&fcActive=ffffff&iconColorActive=454545&bgColorHighlight=fafafa&bgTextureHighlight=01_flat.png&bgImgOpacityHighlight=55&borderColorHighlight=ffdb1f&fcHighlight=333333&iconColorHighlight=8d78a5&bgColorError=994d53&bgTextureError=01_flat.png&bgImgOpacityError=55&borderColorError=994d53&fcError=ffffff&iconColorError=ebccce&bgColorOverlay=eeeeee&bgTextureOverlay=01_flat.png&bgImgOpacityOverlay=0&opacityOverlay=80&bgColorShadow=aaaaaa&bgTextureShadow=01_flat.png&bgImgOpacityShadow=0&opacityShadow=60&thicknessShadow=4px&offsetTopShadow=-4px&offsetLeftShadow=-4px&cornerRadiusShadow=0px 

If you look at the h3 from the example, the gradient goes farther down than any other and it has a strange curve at the end.  I'm viewing on Chorme 5, Firefox 3.6.4, and IE 8.  It appears as if the tabs has a similar problem.