1.10beta,1.10s,1.10 item deletion question

[lfd]

From 1.09D I picked up the first beta [...] figured on not bothering with the newer beta at all [...]

The question is this:

Will my 1.10 beta items disappear upon install & play of the true 1.10?

The answer is "almost certainly".

As I recall it, there was a bug with the saved files from the first 1.10 beta, which is why they all got killed in the second beta. I don't expect there's anything different in the final version to prevent this, since Blizzard said all along that they couldn't guarantee compatibility between the final version and the beta versions.

There is a third-party application called ATMA which could apparently convert your single-player characters from the 1.10 first beta to 1.10s. I don't know if 1.10s characters are compatible with 1.10 final, but I'd say it's much more likely.