my fix for linux dropbox
on jan 1, 2015, I did:
cp ~/.dropbox-dist/dropbox-lnx.x86_64-3.0.3/libxml2.so.2 ~/.dropbox-dist/dropbox-lnx.x86_64-3.0.3/libxml2.so.2_BACKUP20150105
killall dropbox
rm ~/.dropbox-dist/dropbox-lnx.x86*/libxml2.so.2
dropbox start