If you go here: http://stackoverflow.com/questions/4265710/i-need-a-workaround-for-a-safari-chrome-bug-that-is-becoming-a-thorn-in-my-side I tried to provide as much detail as possible. This bug seems to crop up in every version I've tried so far. It is a minor bug and there is a work around but I just thought you should be aware of it. The workaround is in the selected answer, but don't be confused....the solution was not to use $(element).html($(element).html() + char); instead of $(element).append(char); Both of those methods suffer the same effects of the bug. The solution was to use JQuery's .text() function. $(element).text($(element).text() + char); I am sure that if JQuery had a HTML encoded version of .append() that would have worked also, but it does not have that.
In the future, please post all relevant information in Bugzilla. Making everyone click through a link to an external site just wastes time. I can reproduce this bug in Safari 5.0.3 on Mac and with nightlies. Steps to reproduce: 1) Open http://www.jsfiddle.net/Chevex/6n5VV/ 2) Observe text being automatically typed. Typing often stops midway. Resizing the browser window makes the rest of the text appear.
Created attachment 74896 [details] test case Attaching the same test case, modified to reference uncompressed jQuery. As a side note, it's quite inefficient to add text with append() - it adds a separate text node for every character, meaning there will be lots.
Your note about .append() being inefficient is irrelevant as this bug happens even if you use .html(.html() + newHtml); Also, noted about using external links to discuss a bug. I just already put so much info over there that I felt it redundant to include it twice when I could just link.