Yes, a big problem
Sure, if the issue were just the name, it would be a big "meh". But that's not the issue.
The issue is the bungled handling of what should have been an exciting reboot for the brand. Instead what they delivered was:
step 1: Fail to do the most basic [sic] due diligence on the name, like, say, checking the Wikipedia entry
step 2: Launch new name very publicly at DevCon
step 3: oops
step 4: announce new new name, try to convince everybody that this name is much better because it is "aligned with the devices" and "leverages the tremendous brand recognition of Blackberry"... which immediately prompts the question of why they ever thought BBX was a good name in the first place?
So I guess if you think that the only important thing is bits and bytes, then yeah, no biggie. But if you understand that there's more to business than code, this is one more example in a pattern of blunders.