I recently saw this little item posted at Lostpedia. What do you think, mistake or something more?
The new reconstitution of the DHARMA Initiative does not use the word Dharma as a capitalized acronym. This could simply be an oversight by the game's writers, or could be indicative that the project is no longer focusing on "heuristics and research on material applications", keeping the name Dharma for sentimental sake.
Source: Lostpedia