Output.php with compress_output = true, always calls ob_start(‘ob_gzhandler’) causing warning with ajax

[eluser]softark[/eluser]
I'm experiencing the same problem. But not always.

1) running environment (php 5.1.6 linux hosting server)

1-a) compress_output = FALSE + non AJAX output ... OK
1-b) compress_output = FALSE + AJAX output ... OK
1-c) compress_output = TRUE + non AJAX output ... OK
1-d) compress_output = TRUE + AJAX output ... OK

2) development environment (php 5.3.1 win xampp server)

2-a) compress_output = FALSE + non AJAX output ... OK
2-b) compress_output = FALSE + AJAX output ... OK
2-c) compress_output = TRUE + non AJAX output ... OK
2-d) compress_output = TRUE + AJAX output ... NG !!!

So, it seems that some difference between those environment
has some relation to the problem. I don't know for sure.