What is the difference in meaning between these two sentences?
- This feature is now disabled.
- This feature is disabled now.
There's an interesting semantic implication in shifting the position of now.
One would infer that the feature was probably destined to be disabled and now it has been done.
One understands that the feature is currently disabled and may at any future time be enabled again.
The real reason is that in the first case, the subject or main reference is the status ('disabled'); in the latter, the context ('now'). Note that the above inferences are drawn based on convention and not grammatical rules.
Absolutely no meaning difference. They have a different intonation contour, though, and a speaker might prefer one to another. But a spoken version of the second sentence might be an attempt to be dramatic if the speaker shouts "Now!" and pushes the "Disable" switch at the very second he says "Now!"