How reliable is HTTP compression using gzip?
- by Liam
YSlow has suggested that I use HTTP compression to improve the performance of my site. However, as noted by Yahoo that are some problems.
  There are known issues with browsers
  and proxies that may cause a mismatch
  in what the browser expects and what
  it receives with regard to compressed
  content. Fortunately, these edge cases
  are dwindling as the use of older
  browsers drops off. The Apache modules
  help out by adding appropriate Vary
  response headers automatically.
I understand that the most common problem occurs with IE6 behind a proxy. But how common are these problems today? To quantify it, roughly what percentage of web users experience bugs with HTTP compression?