(BTW, I do really appreciate all the work done on samba over the past few decades, so thanks!).

>"Infringement may occur when one party, the 'infringer', uses a trademark which is identical or confusingly similar to a trademark owned by another party, in relation to products or services which are identical or similar to the products or services which the registration covers"

this basically means that in order to have an infringement case, you need to show that both the name/brand/logo are confusingly similar, and also that the product/service/domain are close enough to each other. I don't know that "software" is a sufficiently narrow category to count.

(I'm imagining an a scenario in which an elderly version of myself becomes confused...

Me: "Honey, I think we should watch a movie over the samba!".

My elderly wife: "Did you mean the samba on the smart TV, or the samba on the PC?"

Me: Dag Nabbit!)

Admittedly, a few seconds of thinking made me realise they'd never do that... but it's easy to see why people are getting confused, which is EXACTLY where Trademark stuff comes in.

"Oooooh, some sort of media centre software based on samba? Count me in. Oh, wait ... :("