CA e-Trust Anti-virus gets broken (Score 1)

Lovely, we discovered after we had started to roll out SP2 that it broke CA's Anti-virus. Well not completely, only the remote install part of it stopped working as some of the remote RPC's had been turned off by default in SP2. Now everyone in the IT department is debating wither or not to turn this little feature back on. Windows XP with anti-virus or full SP2 without AV?