### Eclipse Workspace Patch 1.0
#P org.eclipse.pde.ui
Index: src/org/eclipse/pde/internal/ui/editor/plugin/ExtensionsSection.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/plugin/ExtensionsSection.java,v
retrieving revision 1.62
diff -u -r1.62 ExtensionsSection.java
--- src/org/eclipse/pde/internal/ui/editor/plugin/ExtensionsSection.java	31 Jul 2007 17:40:55 -0000	1.62
+++ src/org/eclipse/pde/internal/ui/editor/plugin/ExtensionsSection.java	7 Aug 2007 18:44:37 -0000
@@ -744,6 +744,9 @@
 			// we have a value from a resource attribute
 			if (iconPath != null) {
 				String ext = new Path(iconPath).getFileExtension();
+				// if the resource targets a folder, the file extension will be null
+				if (ext == null)
+					return null;
 				boolean valid = false;
 				// ensure the resource is an image
 				for (int i = 0; i < VALID_IMAGE_TYPES.length; i++) {