Maven 1 users might have discovered this already: the Maven 1 repository at ibiblio.org doesn't work with Maven 1 anymore. Some network setting at the ibiblio server was changed, which causes a redirect that the httpclient library used by Maven 1 doesn't know how to follow, and fails.
Fortunately the fix is easy: put the following setting in your
build.properties in your home directory (
C:\Documents and Settings\[username]):
and you're back in business.