Comment 8 for bug 460197

@birdsaregood - do you still experience this issue with current versions of XQuartz (2.7.3)? IIRC similar issues have been repeatedly discussed on the X11/Xquartz user mailing lists (unrelated to Inkscape), and might have been addressed in XQuartz in the meantime.

Note: Personally, I never experienced the described failure to copy&paste objects within Inkscape with any version of Apple's X11 or with XQuartz (on Mac OS X 10.5.8, and on OS X 10.7.x). Occasionally (on Lion), copying text content from a X11-based application back to a native application failed, but worked again after relaunching X11. I can't recall this happening at all after having upgraded to use the latest releases of XQuartz from <http://xquartz.macosforge.org> (on Lion).