Why can't Twitter get its act together?
There are still stupid little bugs that would take almost no time to fix; for instance, the long-tweet-with-no-spaces-bug. When someone posts a Tweet that is long and contains no spaces (or possibly other delimiters) it causes the page to extend tweet text under the sidebar on the right.
And how about the long-festering no-update-on-follow bug? That happens when you follow someone, but the page never updates. You get the perpetual busy-cycling icon on the top right of the page. Refreshing the page fixes it. That seems to me to be a simple Ajax bug.
C'mon guys, that's like a couple lines of code to fix. Why are you monkeying around with format, font and style sheet changes when there are real problems to fix?
Why can't you get the performance and reliability stabilized? This is not rocket science, guys. Sites like google mail, amazon, and facebook are much more complex in data structure and demanding in functionality, yet they perform with virtually no downtime or lost inputs.
I've analyzed and modeled your information structure. It's not that complicated. You seem to have engineering cycles to redesign your UI and add new functionality. Why in the world can't you just do some simple performance optimization instead of futzing around with surface appearance?
You've got a great concept here, Twitter, just please make it work.