Matthew Miller: "Caution: Only K-5II/K-5IIs users are permitted to download the firmware update."
So, watch out, all you Nikon and Canon users. The download police will come after you.
Pretty sure that's just a warning for owners of the original K-5 not to try and install it - they're not compatible.
Mescalamba: Why would anyone buy this?
Actually, the K-01 is currently Amazon's best selling compact system camera. Try again.
tkbslc: All the size and cost of a K-5 with none of the performance and handling! Where do I sign up!!!!???
From CameraSize.com (http://j.mp/xXKSJf)# Pentax K-5 is 8% (10 mm) wider and 23% (18 mm) taller than Pentax K-01.# Pentax K-5 is 24% (14 mm) thicker than Pentax K-01.# Pentax K-5 [740 g] weights 32% (180 grams) more than Pentax K-01 [560 g] (*inc. batteries and memory card).
K-5 MSRP = $1499 (currently on sale for around $1,000)K-01 MSRP = $749 so still much cheaper than the sale K-5
With an upgraded sensor and much better video. Try again.