I recently downloaded the MonetDB-Feb2010-SuperBall-SP1.tar.bz2 file from the site in order to build MonetDB and I get this build failure:

(...)
config.status: creating mal_config.h
config.status: executing depfiles commands
config.status: executing libtool commands
make  all-recursive
make[1]: Entering directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5'
Making all in src
make[2]: Entering directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src'
make  all-recursive
make[3]: Entering directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src'
Making all in mal
make[4]: Entering directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src/mal'
make[4]: Leaving directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src/mal'
make[4]: *** No rule to make target `mal.c', needed by `all'.  Stop.
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src'
make[2]: Leaving directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5/src'
make[1]: Leaving directory `/var/tmp/MonetDB-1270235519/MonetDB5-server/MonetDB5'
Please refer to the full log at /var/tmp/MonetDB-1270235519/log
If you believe this is an error in the script or the software,
file a bug and attach the logfile.
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
making MonetDB5-server failed

I actually also see this error if I build the server package standalone after building and installing the pre-reqs 

73,
Matthew W. Jones (KI4ZIB)
http://matburt.net