Standard payment working but shows 0 in mail and back-end after VM upgrade

[ankan]

I'am running VM 2.0.22b on Joomla 2.5.14 and have a strange problem with the standard payment plugin.

I have a standard payment method call "Cash on delivery" that cost 40 SEK with no limits of min or max.
In shopping cart and on checkout everything looks as expected, the payment cost is 40 SEK. And its included in total.
However, in the confirmation mail and in the virtuemart back-end the payment cost is 0 SEK, but the total is still right.

This is something that happend after upgrade from Virtuemart 2.0.20? and 2.0.22b.

How can I check what version I had before upgrade if it's relevant?
How do I solve this problem?

[Maxim Pishnyak]

Maybe upgrade to the version 'c' now?

[ankan]

Maybe upgrade to the version 'c' now?

I made that upgrade yesterday because of the security bug and it fixed my problem too. So it was a bug after all?