Yeah, that is what some are saying, it "just cracked". I don't know if it is more prone than others to breaking or if it is just a popular camera with a few instances. I do have a Z120, and would answer any questions you have on it. It is almost identical to the Z750, but with a few omissions and a few enhancements. This question came up so much that I made a list of every teeny difference, here it is....
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Here is a summary. Z120 features vs. Z750 features. I don't want to get into "which is best" and "why I bought the Z750" that seems to pop up so much here. Here are the facts, decide for yourself.
The main differences are that the Z120 uses AA batteries, does not have MPEG4 recording, has a smaller screen, is a little thicker and heavier, and does not use or need a cradle.
Not all of the Z120 specs are shown on the Casio site. Note that some of the specs shown for the Z120 here on dpreview are wrong.
* Z120 is about 0.2" thicker than Z750. (5mm)
* About 0.4 Oz heavier with batteries.
* Uses two AA batteries, three types allowed. Alkaline, Lithium, NiMH.
* Has longer CIPA battery life with NiMH than the Z750. 560 shots with lithium, 410 with NiMH (unknown size), 190 shots with Duracell alkalines. Z750 rated 325 shots. Note that the "battery life" quoted for the Z120 on the casio site is for alkaline batteries. It is nice that you could use alkaline in a pinch though.
* As far as I can tell the picture quality is the same or better, but I would have to see a side by side comparison with the same subjects. The default tone from the Z120 is a lot more neutral and less shapened than the Z750; I think that Casio learned from the Z750 and even has released a new firmware for the Z750 to tone down the default settings.
* The macro mode is actually exaclty the same for both cameras, 10cm. Some site quotes a larger macro distance for the Z120, but the real number is 10cm at wide, just like the Z750. It is not known if the lens is EXACTLY the same as the Z750, but all the parameters are the same.
* Both cameras have a full metal case, the Z120 is not plastic as was rumored.
* The Z120 has higher ISO modes, 800 and 1600 (they call this "anti shake") that the Z750 does not have. It is just my impression, but I think that the ISO 200 and 400 modes are cleaner on the Z120, but I'd have to see a side by side.
* Smaller screen with fewer pixels vertically. This isn't necessarily as bad as it sounds since the difference is only in the # of vertical pixels; they both have 240 across but the Z750 screen is larger. So in comparing the two screens, the Z750 had the dot spread out more horizontally, and the same dot pitch (but larger screen) vertically. I'm hoping that the smaller screen and the thicker case mean no "cracked screens" for the Z120, but it is too soon to tell. Maybe the smaller screen draws less power too, I don't know.
* The Z120 uses MJPEG recording, and the Z750 uses MPEG4. The MPEG 4 is a lot smaller (less than 1/2 size) but may be harder to edi and some users have editing/sync issues but search for postings about it to read the issues for yourself.
* The Z120 has shutter and aperture priority modes on the dial, I don't think that the Z750 has that.
* The Z120 does not have the "EX" button for quick access to one of the features.
* I'm not sure about some of the other minor differences, I'd have to try a Z750 again to tell. For example, does the Z750 have the exposure preview in manual mode on the screen? All of the screens and features seem to be identical.
* The flash cycle time seems to be improved on the Z120.; maybe just because it can use NiMH battereies which can provide more current. The flash recharges in 3 seconds or less on my camera.
* I can't comment on focus speed, low light focus, flash range because I can't do a side by side. It is my impression that these things are at least as good as the Z750. It will focus fine at the one footcandle level.
* It has a couple goofy best shot modes that I don't think that the Z750 has; someone with a Z750 has to help.
* no lens error reports yet, but too soon to tell, there are a lot more Z750s out there.
* The Z120 has no focus assist light, but does not appear to need it unless you want to autofocus a shot that requires more exposure than about 1 second at ISO 200; that's were the trouble starts and you have to manual focus.
* The Z120 does not have a cradle. Obviously you can recharge AA batteries outside the camera. You can connect a TV or USB or power without using the cradle.
* The Z120 has an external power connection.
* The Z120 has a USB cable connection.
* Z120 does ISO 200 in auto mode, Z750 does ISO 100.
