I'm having exactly the same problem in 7.460.

I started with 7.403, where I was *not* using the skiplist and had nothing in it. In fact, I was not even using the HTTP Proxy under 7.403. (I had used it for a while, but turned it off when it starting causing problems that I didn't have time to troubleshoot.)

For the beta, I did a fresh install of the original 7.5 beta (v 7.450?), then restored settings from my last backup of 7.403. Rebooted. Updated ASG to 7.460 via Up2Date. Rebooted again.

Turned on the HTTP proxy and set it to Transparent mode. Confirmed that it was still blocking my TiVos from getting their daily programming update. So I thought I'd add the TiVos to the skip list. I tried, and that's when I hit the error message "One of the values you entered is syntactically or logically incorrect."