TYPO3 Core

I've attached a patch (12129.diff), which solves the problem on my mac - but on a production server it doesn't work (the whole status indicators (green bar + table) doesn't show up).

There seem to be two levels of output buffering, which all have to be flushed.

What the remaining problem on the production server is, I don't know.
Help welcome! This is an important issue!

Is there something in the webservers error log or PHP log?
On updating the translations I get a
"Warning: unpack() [function.unpack]: Type V: not enough input, need 4, have 0 in /Users/olly/Development/typo3/trunk/typo3/mod/tools/em/class.em_unzip.php on line 951"

No, nothing in error_log - there's no error (also not the unpack()-error).
It's a problem of output buffering.
As soon as I remove zlib-extension, everything works fine. It seems to do additional OB, although it's always set to off (PHP's value and zlib.ouput_compression).

Even the following output is shown at once, not bit by bit. (using XAMPP on MacOS, PHP5.2):
echo "1";
sleep(1);
echo "2";
sleep(1);
echo "3";
?>

This additional OB which is done by default seems to cause the problems.

I debugged it local and so found a solution, but I'm not able to debug on production server, but I think the output buffer there is just thrown away and not sent to the browser (as it takes some time until the buttons are shown).

The bug is gone after setting $TYPO_CONF_VARS['BE']['compressionLevel'] = ''

Thanks for narrowing this down to the compression level!

FYI: committed attached v3 patches to
4_2 branch rev 6131
trunk rev 6132