Scenario is as follows:

1. Consider any JApplet.

2. Sign JApplet jar :

C:\>jar cvf JA.jar *.class
C:\>keytool -genkey -alias signFiles -keypass jenutin -keystore jenutin -storepass jenutin
C:\>jarsigner -keystore jenutin -signedjar sJA.jar JA.jar signFiles

3. Load plugin-converter converted HTML in IE5.

Browser hangs. No message in console.

On 1.3.[0|1], in this case the "Security Warning" window pops up with an Unable to verify certificate with root CA exception.