ICEfaces doesn't support JSF 1.2 as I know in 1.7.1 and that is why this restriction is set. This can be esaily removed if ICEfaces supports JSF 1.2

Downgrade is in MyEclipse. There is a dialog asking if user want to downgrade spec to 2.4/2.3. User can choose not to downgrade from 2.5 if they want to take the risk.

On Eclipse this restriction is applied. our tool doesn't really downgrade but won't let you add ICEfaces facet to 2.5 web project.

afaik the jsf 1.1 compatibility mode is determined solely by the faces-config version, not the servlet version (http://jira.icefaces.org//browse/ICE-1474)

If I am not mistaken, in MyEclipse, if you answer No to the downgrade, it will not set up the ICEFaces features in web.xml.

actually, it's a bit misleading, but it still will carry out the addition and configuration of ICEfaces, but will leave the web.xml at 2.5 and the faces-config version at 1.2. ICEfaces will currently not run correctly if the faces-config version is at 1.2. I don't believe, however, that we need to downgrade the servlet version, just the faces-config version.

jsf 1.1 compatibility mode is not (clearly) mentioned in JSF 1.2 spec. I wonder if compatibility mode is somewhat related to JSP 2.1/JSP 2.0 compatibility. If both servlet 2.5 / JSP 2.1 are compatible with servlet 2.4/JSP 2.0, we could possibly break the version alignment between servlet and faces. I will check the specs.

Do you have more info on compatibility mode? developer's guide needs to be changed as well if that is the case.

there's no info on the compatibility mode, but servlet 2.5 is fully backwards compatible to 2.3, so I don't think there's anything to worry about (http://jcp.org/aboutJava/communityprocess/maintenance/jsr154/servlet-2.5_MR2.html).

restriction removed in Eclipse 3.4 integration.

It needs to be removed from MyEclipse integration as well.

done and checked in.

Eclipse 3.4 integration and MyEclipse 7.0 M2