Since the last Safari update (I'm on Lion, 10.7.5), I've been unable to connect to a client's VPN. Their VPN runs via a Java network client from Juniper Networks, and it appears to require write-access and
chmod permissions on several folders. I can get around this by enabling "Run in Safe Mode" in Safari, which is what the client is recommending I do. I can't find anything about the security ramifications of doing this and I don't feel comfortable downgrading security on my system, even if it's for a client I trust. On the other hand, I don't know if I was running the software in "unsafe mode" before the update without knowing it (which is what I'm afraid was probably the case).
Does anyone know what the ramifications of running Java apps in "unsafe mode" are?
There is a knowledgebase article (Google cache) on this, which says they are working on a certified client. I understand it won't be out for another month.