Yep, that is the post.
cgminer 4.6.1 does NOT come with the firmware so you'll need to follow the instructions to install it.
There are tables of power usage at different frequencies floating around, but again the best reference is the S3 thread.

PS. I'll add the info in the link about adding frequecies to the dropdown to the OP at a later time.

I have days when I notice the HW numbers spike to astronomical figures on the OC'd S3's, but a reboot via SSH always "settles" the unit down. Having said that, it may be one of several things, and I could be wrong but I'll offer a few:
1. You are not powering your S3 properly (I used only 2 connectors, but made sure the cables can adequately juice the unit)
2. If it is an earlier S3, you may need to re-apply the paste (bitmain did a very amateur job!) to enable your unit handle higher temps better.
3. Your unit's freq sweet spot is 250M (some units are less others more ... luck of the draw!).
On a personal level, if it hashes at 505GH/s with acceptable HW errors, I'd be over the moon.

Thanks for mentioning that the link to 4.6.0 is no longer available (and I will add a note to that), however, just below that link in the OP is the link to cgminer 4.6.1 (including the similar process of installing it).

^^ No worries.
Updated OP with link to adding frequencies to latest firmaware (Aug 2014) and highlighting the deprecation of cgminer 4.6.0

ah so I wasn't crazy!  Whew!

Updated OP, though both versions are still available unlike version 4.6.0 flat.

Do you have the latest firmware on them? i had exactly the same experience with my batch 6 units and reverted to the stock cgminer, however (again as is documented in this thread), when I updated to the latest firmware, which I had to do when upgrading my S1's, I get the same result as the stock, or slightly better, but with the security flaws plugged.

Yep, the earlier batches do not seem to be up to it. I suspect it is due to their poor temp handling and suggested to someone to re-do their heat paste; Though he had some good results using a conductive compound, he re-applied using a non conductive paste and has not reported their results. With several units .... that would be a day's work! Worth it? Not sure.

Is upgrading to the latest CGminer for later batches of S3, including S3+ and upgraded S1's recommended?

Running the latest firmware, I upgraded all of the miners to CGMiner 4.6.1 and hashing restarts every few minutes. Overclocking is minimal - 237.5 to 243.75 with temps between 39 and 41 degrees.  The miner itself doesn't restart, only the hashing.

I had to revert back to the CGMiner included with the firmware and they hash continuously without trouble.

Okay well I have upgraded the cgminer on my S3's and will be working on upgrading my S1s to 4.2.0 while I wait for the S3's to settle down to decide if I want to try and push the freq.