Java version: 7u11

If it previously worked, which was the last version it worked in: Java 7u10

OS: Mac OSX

Browser Name: Safari 6.0.2 and 6.0.3

Hardware: MacBook Pro

Applet Name and link: ptilive.wimba.com

Bug description:
Classroom application Wimba is not running with java 7u11 on Mac and Apple Safari 6.0.2 and 6.0.3 (the lower half of the applet not visible or not readable), however working fine and readable in Firefox

Steps to reproduce:
1) Go to ptilive.wimba.com
2) Click Participant Login
3) Enter a Name and Enter
4) Run Wizard and go through steps
5) May be able to simply click "Click Here" and enter the room and it should download whats needed.
6) Bottom of the applet should be readable text and not gibberish

Reproduced by Java.com team: Yes

Error message/Java console output:
Java Plug-in 10.11.2.21
Using JRE version 1.7.0_11-b21 Java HotSpot(TM) 64-Bit Server VM
User home directory = /Users/ball
----------------------------------------------------
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 <n>
----------------------------------------------------
Fri Jan 18 10:36:28 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2634050, fPowerNotifyPort= 0x2634160
Fri Jan 18 10:36:29 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3866b10, fPowerNotifyPort= 0x3866a10
Fri Jan 18 10:36:30 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2558c20, fPowerNotifyPort= 0x2558cf0
Fri Jan 18 10:36:31 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2634050, fPowerNotifyPort= 0x2634160
Fri Jan 18 10:36:32 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2558bd0, fPowerNotifyPort= 0x255c470
Fri Jan 18 10:36:33 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x255ec20, fPowerNotifyPort= 0x255c470
Fri Jan 18 10:36:34 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x16670c0, fPowerNotifyPort= 0x16708d0
Fri Jan 18 10:36:35 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2259cb0, fPowerNotifyPort= 0x225d370
Fri Jan 18 10:36:36 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x1667040, fPowerNotifyPort= 0x1642560
Fri Jan 18 10:36:37 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3d35940, fPowerNotifyPort= 0x3d35920
Fri Jan 18 10:36:38 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3d33430, fPowerNotifyPort= 0x3d353c0
Fri Jan 18 10:36:39 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2558c20, fPowerNotifyPort= 0x2558cf0
Fri Jan 18 10:36:40 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3867150, fPowerNotifyPort= 0x3866d40
Fri Jan 18 10:36:41 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3867040, fPowerNotifyPort= 0x3866d40
Fri Jan 18 10:36:42 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2233df0, fPowerNotifyPort= 0x22691e0
Fri Jan 18 10:36:43 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2558c20, fPowerNotifyPort= 0x2558cf0
Fri Jan 18 10:36:44 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2558c20, fPowerNotifyPort= 0x2559810
Fri Jan 18 10:36:45 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3c341f0, fPowerNotifyPort= 0x3c35b10
Fri Jan 18 10:36:46 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2244300, fPowerNotifyPort= 0x2268de0
Fri Jan 18 10:36:47 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3866100, fPowerNotifyPort= 0x38669e0
Fri Jan 18 10:36:48 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x16444f0, fPowerNotifyPort= 0x163e460
Fri Jan 18 10:36:49 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x1667040, fPowerNotifyPort= 0x1642560
Fri Jan 18 10:36:50 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x2259cb0, fPowerNotifyPort= 0x22698f0
Fri Jan 18 10:36:51 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x1670340, fPowerNotifyPort= 0x163dce0
Fri Jan 18 10:36:52 EST 2013 - [debug] IAX_OUT DVFreeThread - CFMachPortCreateWithPort hack = 0x3866100, fPowerNotifyPort= 0x38669e0

Screenshot:
Firefox Working
http://dl.dropbox.com/u/18068810/Firefox.png

Safari Not Working:
http://dl.dropbox.com/u/18068810/Safari.png