Hi TestLink!
I use TestLink 1.7.4 + PHP 5.2.6 + Apache 2.0 + Postgres 8.1 in environment Windows XP
Problem: I have loaded files (*.doc, *.pdf, *.xls) in the Requirements, test cases and etc. When I try to open the loaded files the browser (IE, FireFox) is displayed the broken text .
How to make so that it was possible to correctly open or unload the necessary document?
Thanks
Unloading of the attached files
Thanks that have answered 
The TestLink is customised on storage of files in a file system ($g_repositoryType = TL_REPOSITORY_TYPE_FS)
I load a file on page "Edit Requirement" by means of the button "Upload..."
The file correctly attached (I check its presence in a folder c:\Program Files\Apache Group\Apache2\htdocs\upload_area\requirements\8\ and also it correctly opens in a browser by reference http://My_server/upload_area/requirements/8/a2c7b52b643d5304be873bd1e24937e7.doc)
But if to try to open a file having click its icon on page "Edit Requirement" in a browser tehe broken text is displayed. The similar text if to open file by means of a notepad.exe.
It occurs to all files (*.doc, *.pdf, *.xls, *.jpg)

The TestLink is customised on storage of files in a file system ($g_repositoryType = TL_REPOSITORY_TYPE_FS)
I load a file on page "Edit Requirement" by means of the button "Upload..."
The file correctly attached (I check its presence in a folder c:\Program Files\Apache Group\Apache2\htdocs\upload_area\requirements\8\ and also it correctly opens in a browser by reference http://My_server/upload_area/requirements/8/a2c7b52b643d5304be873bd1e24937e7.doc)
But if to try to open a file having click its icon on page "Edit Requirement" in a browser tehe broken text is displayed. The similar text if to open file by means of a notepad.exe.
It occurs to all files (*.doc, *.pdf, *.xls, *.jpg)
The problem be solved! 
When we configured a file "config.inc.php" in the block /** [LOCALIZATION] */ have written " $g_default_language = 'ru_RU' ". Because of it there was a described before error. After replacement by on " $g_default_language = 'en_GB' " - TestLink began to work normally.
Sorry to trouble you.

When we configured a file "config.inc.php" in the block /** [LOCALIZATION] */ have written " $g_default_language = 'ru_RU' ". Because of it there was a described before error. After replacement by on " $g_default_language = 'en_GB' " - TestLink began to work normally.
Sorry to trouble you.