Try this: LD_PRELOAD=/usr/lib/libXt.so.6 /usr/lib/firefox/firefox
That will probably, but temporarily fix the problem. The problem appears to be that nppdf.so expects that libXt.so to already be loaded. A hack that will work around the problem (but load more, possibly unnecessary libraries, depending on what you're doing): 1) sudo cp -a /usr/lib/firefox/firefox /usr/lib/firefox/firefox.old 2) sudo vi /usr/lib/firefox/firefox 3) search for: export LD_LIBRARY_PATH 4) change it to: export LD_LIBRARY_PATH LD_PRELOAD=/usr/lib/libXt.so.6 export LD_PRELOAD Save the file and make sure firefox is completely closed. When you start up Firefox the next time, you should find that Acrobat reader works, at least until an update comes out that overwrites the firefox script. -- acrobat plugin not working https://launchpad.net/bugs/50496 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs