WorldImageReader does not process all possible world files

WorldImageReader does not process all possible world files. By the documentation http://docs.codehaus.org/display/GEOTOOLS/Upgrade+to+2.4, there was made some change in version 2.3.1, but WorldImageReader does not iterates the set:

final Set ext=WorldImageFormat.getWorldExtension(extension);
final Iterator it=ext.iterator();
if(!it.hasNext())
throw new DataSourceException("Unable to parse extension "+extension);
file2Parse = new File(new StringBuffer(base).append((String)it.next()
).toString());

if (file2Parse.exists()) {
...............

It takes just first extension.