IPod Touch, iOS6, "Other" memory increasing every sync?

Question

I have noticed that since the "update" to 6.0, my iPod touch has an increasing amount of "other" memory with every sync. The amount of "other" increases by about 400 mb every time I sync it. Even when I synced it twice in a row with no new podcasts or anything at all that would have been different from the sync just performed.
I restored it from backup, and the "other" memory stayed the same. When it got up to 14 GB, I restored and set up as "new", and the "other" memory dropped back to normal, then immediately started increasing with each sync.
I de-selected the only 2 apps that have updated recently, the only thing I couldn't undo is iOS 6. Other than that, I have done nothing different than I've been doing for the 2+ years I've had it.
Is there something I have set wrong in the settings since it's a touch and not a phone? I didn't change anything when 6 was installed, should I?
I really don't want to have to restore this thing as "new" every month!

Answer 1

Thanks for your reply.  I saw those threads and a few others when I searched earlier, but not the one about Safari. I don't use Safari often, but I will try clearing the cache. That's the only one of those things I haven't tried.
I wondered what the "other" was a long time ago, and looked it up. It was behaving normally until recently, after the iOS update, when it started gaining .2-.5 GB per sync. And restoring as "new" didn't stop that, it only reset the "other" to a normal size.
I mainly use this iPod for podcasts & mp3, and watching videos. A few other apps, nothing new added or changed that I could maybe think might be the cause.