...and all that glitters is not gold.
From the Change Log:
25. Sept 2008 XAMPP 1.6.8
- Upgrade OpenSSL 0.9.8i
- Upgrade phpMyAdmin 184.108.40.206
15. Sept 2008 XAMPP 1.6.8 beta2
- Upgrade phpMyAdmin 220.127.116.11
- Upgrade phpMyAdmin 2.11.9
I just downloaded the 7Zip upgrade file and installed the contents which included version 18.104.22.168 of phpMyAdmin - perhaps your download version still has the older phpMyAdmin version included in which case you should try and contact a developer to let them know.
Contact XAMPP details here http://www.apachefriends.org/en/contact.html
(use any of the methods other than the forum - perhaps email Oswald or use the IRC channel) and pass on your findings, it is rare a developer reads and takes any actions from posts in this English forum.
If it is any consolation, I have known this lax checking of the download archives to happen on very few rare occasions over the years - but once the problem is recognised it usually fixed in quick time.
There is also a bug reporting site here: