The following information was provided by the package's contributor.
Name of contribution: curve2e
Author's name: Claudio Beccari
Package version: 1.40
Location on CTAN: tex-archive/macros/latex/contrib/curve2e/
Summary description: Upgrade to comply with pict2e 2011
License type: lppl
Announcement text given by the package's contributor:
The pict2e 2011 driver for xetex has been modified so that certain
macros of the previous version of curve2e became incompatible with the
parent package pict2e. Corrections have been introduced to avoid
inconsistencies when usin xelatex as the typesetting engine.
thanks for the upload; i've installed the new version, and updated the
catalogue repository.
Users may view the package catalogue entry at
http://www.tex.ac.uk/tex-archive/help/Catalogue/entries/curve2e.html
or they may browse the package directory at
http://www.tex.ac.uk/tex-archive/tex-archive/macros/latex/contrib/curve2e/
The catalogue entry will change (somewhat) on the web, by tomorrow morning.