Simon Willison’s Weblog

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WebKit is Dropping HTML5 “popstate” Events (via) Really nasty bug with WebKit’s pushState support, discovered by Ben Cherry from Twitter. popState events get dropped if the user navigates while an outbound network request is in progress. # 30th October 2010, 7:41 am

Internet Explorer: Global Variables, and Stack Overflows. An extremely subtle IE bug—if your recursive JavaScript function is attached directly to the window (global) object, IE won’t let you call it recursively more than 12 times. # 2nd March 2010, 9:21 am

When Bugs Collide: Fixing Text Dimming in Firefox 2. Handy tips from Drew on fixing the glitchy text rendering in Firefox 2 when you animate opacity without breaking alpha-transparent PNGs in IE6. # 19th June 2008, 6:09 pm

Obscure bugs revisited: IE, HTTPS and plugins. Filed for future reference: IE breaks mysteriously if you serve it up plugin content (e.g. Flash) over HTTPS with a no-cache header—it deletes the file from cache before the plugin software gets a chance to open it. # 30th May 2008, 9:54 am

Operation Aborted. Another fantastically obscure IE bug: appending new elements to the HEAD element breaks if a BASE tag is present. # 16th August 2007, 11:21 am

Using hasLayout to fix bugs in IE. With illustrative screen shots. # 2nd December 2006, 2:10 pm