These sound more like bugs to me....

----- Original Message -----
From: "Joerg Hohwiller" <jo...@j-hohwiller.de>
To: "Maven Developers List" <dev@maven.apache.org>
Sent: Saturday, May 9, 2009 4:48:40 PM GMT -05:00 US/Canada Eastern
Subject: maven 2.1 incompatibility list

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Hi there,

I found that there is a little list of incompatibilities form m2.1 at:

http://maven.apache.org/release-notes.html

However there are a lot more.

E.g. with maven 2.0.x you could have a module included in your
toplevel pom that you also add as dependency to some plugin such
as checkstyle or findbugs. In maven 2.1 you have to remove the
module declaration or you will get a cyclic dependency error
(that is hard to unserstand since it says that some module depends
on itself - which is right but you can not see this in its pom
directly because it is inherited).

Additionally with maven 2.0.x you could have the same build
plugin twice, such as a javadoc-plugin configured to aggregate
and a javadoc-plugin configuered per module. Maven 2.1 accepts
the pom but seems to ignore the second, duplicate plugin.

Regards
  Jörg
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