I have two (supposedly) identical installations on two different Windows XP systems. One works flawlessly, the other fails with the message that there is no support for png.
On the GeoServer Administration panel on both it has "Version of JVM: Sun Microsystems Inc. : 1.4.2_06
On the working system it has "JAI is available: true", on the other "false".
The Windows add/remove programs shows the same J2SDK and Java Advanced Imaging 1.1.2 for JDK installed.
I even copied the entire \j2sdk1.4.2_06 directory from the good machine to the failing machine. It looks like the right JAI dll and jar files are in the right places.
How can I diagnose this?