We purchased the H5 just before Christmas of 2006. This camera does a super job when it works right, in my amateur opinion. We especially love the large screen; that, and the Sony name, is why we purchased this particular camera. Two weeks ago, we noticed the focus issue, and next thing we know, the button pops off; the camera had worked fine until then. I purchased the camera from B&H Photo online, and did not purchase an extended warranty. I carried the camera to our local photo shop, and got the old flat rate $181 cost plus shipping to fix spiel, but I decided that was too much to dump into this camera and felt there had to be an easy fix for this. After searching several different forums and finding that, indeed, there seems to be a universal problem with the "Release Assembly" on the H series cameras, I bit the bullet and ordered the X21083262 RELEASE ASSY (420) from Sony http://servicesales.sel.sony.com/web/productSearch.do
I just went ahead and bought 3 of the darn things, cheaper than buying a new camera ($76 delivered), plus we like the camera and will just pop a new one on when the next one breaks. It is an easy fix, just slide a thin screwdriver or knife blade at the base of the silver ring at the button and gently pry upward, it will snap right off, and the replacement snaps right back on. (See http://thelope.com/2007/03/sony-dsc-h2-problems.html) I do think it is awful that Sony has not acknowledged the problem, and when my 3 buttons are gone, so is my loyalty to Sony. Hope this helps others out there with similar problems.