Just updated Java, on a Mac running 10.9.1 in Safari and Firefox Java is now blocking the ability to upload to svManager even after accepting risk to run, and putting in "unsafe mode" in preferences. An error message comes up saying, "This application will be blocked in future Java security update because the JAR file manifest does not contain the Permissions attribute. Please contact the Publisher for more information."

Further details:

Java Plug-in 10.51.2.13
Using JRE version 1.7.0_51-b13 Java HotSpot(TM) 64-Bit Server VM
User home directory = /Users/x
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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>
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Missing Application-Name manifest attribute for: (websiteURL)/svmanager/uploader/myuploader-source-signed-1.16.jar