yes, it's a palindrome
Come on, you're all computer people, you should know this.
It's a palindrome at the token level, not the character level. Or another way to look at it, it's a palindrome if the numbers are taken in hexadecimal: A.4.A.
English palindromes have a very similar problem, which we just blithely ignore. The example given, "Satan, oscillate my metallic sonatas.", is not a palindrome because of different spacing, punctuation and capitalization. What, you say it is? Then you should accept the token-level version number palindrome.
The poster who cites Wikipedia showing the release history "full of palindromes" is only partly correct. There are a bunch of early versions like "3.3", but these are barely palindromes. "6.0.6" is the only previous 3-element example, and it was never actually released.