While testing some SVG in FOP I had a swallowed NPE from a clip-path style attribute. The SVG doesn't have a base URL in this case which caused the NPE. The attached patch fixes this.
Created attachment 21256 [details] Patch to fix the NPE and to "unswallow" the original exception in CSSEngine
Looks good. Applied, thanks! http://svn.apache.org/viewvc?rev=606891&view=rev