Comment 2 for bug 36585

My default encoding is "Central European".

I did not find the error in other desktop applications (tried yelp, openoffice, gedit) - 'st' is rendered fine there.
I also not found any other problematic combination of letters - only 'st'.

Problem occurs with "FreeSerif", "Serif", "FreeMono", "Monospace" fonts selected as default in Firefox.
It does not occur with "BitStream Vera Serif" font.

The problem did not exist in Ubuntu 5.10.

Some 'reportbug' generated info below:

Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-19-k7
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)

Versions of packages firefox depends on:
ii deb 2.15.2 Miscellaneous utilities specific t
ii fon 2.3.2-1.1ubuntu5 generic font configuration library
ii lib 1.11.3-0ubuntu1 The ATK accessibility toolkit
ii lib 2.3.6-0ubuntu14 GNU C Library: Shared libraries an
ii lib 1.0.4-0ubuntu1 The Cairo 2D vector graphics libra
ii lib 2.3.2-1.1ubuntu5 generic font configuration library
ii lib 2.1.10-1ubuntu1 FreeType 2 font engine, shared lib
ii lib 1:4.0.3-1ubuntu3 GCC support library
ii lib 2.10.1-0ubuntu2 The GLib library of C routines
ii lib 2.8.16-1ubuntu1 The GTK+ graphical user interface
ii lib 0.8.6-0ubuntu4 library for parsing CORBA IDL file
ii lib 6b-11 The Independent JPEG Group's JPEG
ii lib 2:1.firefox1.5.dfsg+1.5.0.1-1ubuntu9 Netscape Portable Runtime Library
ii lib 2:1.firefox1.5.dfsg+1.5.0.1-1ubuntu9 Network Security Service Libraries
ii lib 1.12.0-0ubuntu1 Layout and rendering of internatio
ii lib 1.2.8rel-5 PNG library - runtime
ii lib 4.0.3-1ubuntu3 The GNU Standard C++ Library v3
ii lib 2:1.0.0-0ubuntu4 X11 client-side library
ii lib 1.1.5.2-0ubuntu2 X cursor management library
ii lib 2:1.0.0-0ubuntu3 X11 miscellaneous extension librar
ii lib 1:3.0.1.2-0ubuntu2 X11 miscellaneous 'fixes' extensio
ii lib 2.1.8.2-0ubuntu2 FreeType-based font drawing librar
ii lib 2:1.0.0-0ubuntu2 X11 Input extension library
ii lib 2:1.0.1-0ubuntu2 X11 Xinerama extension library
ii lib 1:1.1.0.2-0ubuntu2 X11 RandR extension library
ii lib 1:0.9.0.2-0ubuntu2 X Rendering Extension client libra
ii lib 1:1.0.0-0ubuntu2 X11 toolkit intrinsics library
ii psm 22.1-1 Utilities that use the proc filesy
ii zli 1:1.2.3-6ubuntu4 compression library - runtime