Creating this case as a separate issue based on work done in ICE-7191.

This is not strictly a portlet issue but it currently only manifests there due to the lengthy nature of Liferay URLS. The problem is seen when running the ACE Showcase Portlets example on Liferay using MyFaces - the problem doesn't manifest with Mojarra. The various 'resource' EL expressions that we use in our themes.css file all look something like this:

url("#{resource['icefaces.ace:themes/sam/images/ui-default.png']}")

However, after being processed and sent to the client, they arriving somewhat garbled. Here are a few examples of what the resource URLs get turned into when they arrive at the client - note that the they are incomplete in various spots:

url("est/acefile?_fileEntry_WAR_showcaseportlet_ln=icefaces.ace&_fileEntry_WAR_showcaseportlet_javax.faces.resource=themes%2Fsam%2Fimages%2Fui-bg_flat_75_ffffff_40x100.png&p_p_col_count=1&p_p_col_id=column-1&p_p_id=fileEntry_WAR_showcaseportlet&p_p_lifecycle=2")

url("lhost:8080/web/guest/acefile?_fileEntry_WAR_showcaseportlet_ln=icefaces.ace&_fileEntry_WAR_showcaseportlet_javax.faces.resource=themes%2Fsam%2Fimages%2Fui-default.png&p_p_col_count=1&p_p_col_id=column-1&p_p_id=fileEntry_WAR_showcaseportlet&p_p_lifecycle=2")

url("localhost:8080/web/guest/acefile?_fileEntry_WAR_showcaseportlet_ln=icefaces.ace&_fileEntry_WAR_showcaseportlet_javax.faces.resource=themes%2Fsam%2Fimages%2Fsprite.png&p_p_col_count=1&p_p_col_id=column-1&p_p_id=fileEntry_WAR_showcaseportlet&p_p_lifecycle=2")

url("b/guest/acefile?_fileEntry_WAR_showcaseportlet_ln=icefaces.ace&_fileEntry_WAR_showcaseportlet_javax.faces.resource=themes%2Fsam%2Fimages%2Fui-icons_222222_256x240.png&p_p_col_count=1&p_p_col_id=column-1&p_p_id=fileEntry_WAR_showcaseportlet&p_p_lifecycle=2")

Running the ACE Showcase with MyFaces in a non-portlet environment shows the URLs properly resolved:

url("/my/javax.faces.resource/themes/sam/images/ui-bg_flat_75_ffffff_40x100.png.jsf?ln=icefaces.ace")
url("/my/javax.faces.resource/themes/sam/images/ui-default.png.jsf?ln=icefaces.ace")
url("/my/javax.faces.resource/themes/sam/images/sprite.png.jsf?ln=icefaces.ace")