CVS message: skip modified dirty file??

Just did an update to my torque checkout and got the following messages.

Has anyone an idea what this means?
I haven't changed the files. At least not that I know.

cvs update: Skip a modified dirty file : torque_cw6.mcp
cvs update: Skip a modified dirty file : torque_cw7.mcp
[code]
cvs update: Skip a modified dirty file : torque_cw8.mcp
cvs update: Skip a modified dirty file : ljpeg_cw6.mcp
cvs update: Skip a modified dirty file : ljpeg_cw7.mcp
cvs update: Skip a modified dirty file : ljpeg_cw8.mcp
cvs update: Skip a modified dirty file : lpng_cw6.mcp
cvs update: Skip a modified dirty file : lpng_cw7.mcp
cvs update: Skip a modified dirty file : lpng_cw8.mcp
cvs update: Skip a modified dirty file : lungif_cw6.mcp
cvs update: Skip a modified dirty file : lungif_cw7.mcp
cvs update: Skip a modified dirty file : lungif_cw8.mcp
cvs update: Skip a modified dirty file : zlib_cw6.mcp
cvs update: Skip a modified dirty file : zlib_cw7.mcp
cvs update: Skip a modified dirty file : zlib_cw8.mcp