Yes, but I am not able to validate it with a source as I can't remember where I saw it.
Honestly, I'd be shocked if this is the case. It's got to be a mistake. Imagine Apple providing diminished support just because you bought an iPod at Best Buy. The uproar would be huge.
If it's a concern for someone, I suggest you contact them directly.
Ultimately, I think in this day and age of CMS and theme-specific creation tools, apps like Dreamweaver, Flux, et al. are largely obsolete and don't interest me.
Man is a genius when he is dreaming.
- Akira Kurosawa