This sort of flew in under the radar and most PlayStation 3 owners will probably never know it happened.
Even so, it's good to have the info. Some PS3 owners complained of problems associated with the latest firmware update, even though Sony was insistent in their claims that update 3.41 didn't have any impact on the main issue (swapping in a new HDD). And officially, Sony hasn't said the update caused any problems…so how come we have a new version of firmware 3.41? According to a post made at the PS3News forum , there's a distinct technical difference between the "new" 3.41 and the "old" 3.41; there's even a pic of the code comparison. We're no good at interpreting that kind of thing, but the consensus appears to be positive: whatever Sony did, it fixed the HDD issues. Perhaps they didn't want to acknowledge that 3.41 really was flawed in some way, or maybe they just weren't convinced the problem was widespread enough to make it public. But hey, a fix is a fix is a fix. Why look a gift horse in the mouth?
So if you haven't downloaded firmware update 3.41 for your PS3 yet, when you go to do it, you'll receive the "new" version. Shouldn't pose any problems.