I filed this same bug against Blink, here is the information I shared with them Example URL: http://jsbin.com/lobuvacezo/1/edit?html,css,output Steps to reproduce the problem: 1. Open the url and view the rendered test results What is the expected behavior? All three of them should have the same overflow behavior (they should overflow). What went wrong? Blink/Webkit seems to have a bug where buttons get a default overflow of hidden or if a descendant gets any position other than static. Did this work before? N/A Does this work in other browsers? Yes Chrome version: 41.0.2272.76 m Channel: stable OS Version: 10.0 Flash Version: Shockwave Flash 16.0 r0 I raised this to the CSS WG (https://lists.w3.org/Archives/Public/www-style/2015Mar/0099.html) and it was agreed that this was a Blink/Webkit bug. Other Browsers Tested: Chrome 41: Fail IE 11: Fail IE Edge (Windows 10 TP): Pass Firefox: Pass Presto: Pass Safari 7: Fail Safari 8: Fail
I fixed button overflow bug msyself. So I know this is fixed. Marking this as "RESOLVED CONFIGURATION CHANGED".