CryptoMapper - Error decoding text, exception thrown for links in markup

When CryptoMapper is used an exception is thrown for any links in the page markup such as images and stylesheets.

Can be replicate with this init() and a standard quickstart.
public void init() {
super.init();
getSecuritySettings().setCryptFactory(new KeyInSessionSunJceCryptFactory());
setRootRequestMapper(new CryptoMapper(getRootRequestMapper(), this));
}

HomePage.html
<img src="logo.png" width="50px" height="50px" alt="Wicket Logo" />

ERROR - AbstractCrypt - Error decoding text: logo.png
java.lang.RuntimeException: Unable to decrypt the text '??(?x'
at org.apache.wicket.util.crypt.AbstractCrypt.decryptByteArray(AbstractCrypt.java:150)
at org.apache.wicket.util.crypt.AbstractCrypt.decryptUrlSafe(AbstractCrypt.java:66)
at org.apache.wicket.request.mapper.CryptoMapper.decryptUrl(CryptoMapper.java:159)
at org.apache.wicket.request.mapper.CryptoMapper.mapRequest(CryptoMapper.java:102)
at org.apache.wicket.request.cycle.RequestCycle.resolveRequestHandler(RequestCycle.java:181)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:206)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
..snip
Caused by: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.SunJCE_ab.b(DashoA13*..)
at com.sun.crypto.provider.PBEWithMD5AndDESCipher.engineDoFinal(DashoA13*..)
at javax.crypto.Cipher.doFinal(DashoA13*..)
at org.apache.wicket.util.crypt.SunJceCrypt.crypt(SunJceCrypt.java:94)
at org.apache.wicket.util.crypt.AbstractCrypt.decryptByteArray(AbstractCrypt.java:146)
... 32 more
ERROR - CryptoMapper - Error decrypting URL
java.lang.IllegalArgumentException: Argument 'url' may not be null.
at org.apache.wicket.util.lang.Args.notNull(Args.java:41)
at org.apache.wicket.request.Url.parse(Url.java:127)
at org.apache.wicket.request.mapper.CryptoMapper.decryptUrl(CryptoMapper.java:160)
at org.apache.wicket.request.mapper.CryptoMapper.mapRequest(CryptoMapper.java:102)
at org.apache.wicket.request.cycle.RequestCycle.resolveRequestHandler(RequestCycle.java:181)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:206)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)