I came across this when I was checking my console log and found that the SystemUIServer[721] kept logging "Unsafe Javascript" crap when browsing with Safari.
After reproducing the problem a couple of times, I found that when the Debug mode in Safari is active, with "Enable Runaway Javascript Timer" enabled, any sites most likely making http connections through an iframe or frameset, this "Unsafe Javascript" string stuff is logged in both Safari's Debug Javascript Console, as well as the regular Console.
Whether this is good or not, I don't know. I just kept seeing the "Unsafe" stuff, and couldn't part from determining why this is happening. I have no idea how this is being handled in the background between Console and Safari, but I thought it was weird that all this stuff was being spit into Console. The reason I don't like Safari being so verbose with Console is that it leaves browsing tracks in Console. My thoughts are that these logs should be sand boxed within Safari and flushed on quit.
As for the solution, just disable "Enable Runaway Javascript Timer" in Safari under Debug, or switch browsers.
I still have to check to see if this is the case in 10.3.9.
Using:
Safari 3.0.4 (523.12.2)
P.S. from my log...
[4543]
http://discussions.apple.com/login!default.jspa line 92: ReferenceError: Can't find variable: AC
(event handler):Can't find variable: AC
[4543]
http://discussions.apple.com/thread.jspa?threadID=1293470 line 92: ReferenceError: Can't find variable: AC
(event handler):Can't find variable: AC
[4543]
http://discussions.apple.com/post!reply.jspa?threadID=1293470 line 92: ReferenceError: Can't find variable: AC
[4543]
http://discussions.apple.com/resources/merge line 4046: ReferenceError: Can't find variable: tinyMCE
