About Nikon D5100 DSLR?

When VR is on in 18-55mm
and while seeing in viewfinder if I press half shutter button it'll be auto focused but when I release shutter (shutter button without pressing further) button image in viewfinder will shift a little (very little if carefully observed)!
But when I switch off the VR image shifting is not seen in viewfinder.
Is this common in all DSLR?
Although image is not affected. I just wanted to know…

Yes, this is normal. The optical VR in the lens deactivates rather suddenly to preserve battery power, resulting in this light shift.
- Tell me pros and cons of nikon d5100 and d3100. More emphasis on d5100?
- Trying to decide on a new DSLR: Canon EOS Rebel T3i, Nikon D5100, or Nikon D3100?
- Lens to fit both Nikon N2000 SLR and Nikon D5100 DSLR?
- Will a Nikon Zoom-Nikkor 50-300mm f/4.5 Non-AI Manual Focus Lens fit my Nikon D5100 DSLR?
- Nikon d5100 dslr or nikon d3200 slr?