First: to make this post I downloaded the client from this site, ran it with no problems, and created a character and played. But, when trying to play on kongregate I get this:

Java Plug-in 10.45.2.18
Using JRE version 1.7.0_45-b18 Java HotSpot(TM) 64-Bit Server VM
User home directory = /Users/Westley
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to
----------------------------------------------------
Missing Application-Name: manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
Missing Permissions manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
Missing Codebase manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
Missing Application-Name: manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
Missing Permissions manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
Missing Codebase manifest attribute for: http://download.threerings.net/spiral/client/getdown-pro.jar
2013/11/03 20:29:56:105 INFO r.a: App Base: http://download.threerings.net/spiral/client
2013/11/03 20:29:56:107 INFO r.a: App Name: spiral
2013/11/03 20:29:56:119 WARNING r.a: Failed to create '/Users/Westley/Library/Application Support/spiral/getdown.txt'.
java.io.FileNotFoundException: /Users/Westley/Library/Application Support/spiral/getdown.txt (Operation not permitted)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.(FileOutputStream.java:221)
at java.io.FileOutputStream.(FileOutputStream.java:171)
at com.threerings.getdown.launcher.GetdownAppletConfig.writeToFile(Unknown Source)
at com.threerings.getdown.launcher.GetdownAppletConfig.createFiles(Unknown Source)
at com.threerings.getdown.launcher.GetdownAppletConfig.init(Unknown Source)
at com.threerings.getdown.launcher.GetdownApplet.init(Unknown Source)
at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Thread.java:744)
2013/11/03 20:29:56:280 WARNING r.a: No resource certificate found, falling back to class signers
2013/11/03 20:29:57:341 WARNING r.a: Failed to preinit: java.io.FileNotFoundException: /Users/Westley/Library/Application Support/spiral/getdown.txt (No such file or directory)
2013/11/03 20:29:57:367 WARNING r.a: Missing translation message 'm.create_getdown_failed'.

I have no idea what this means, help please?