Гм, посмотрел я свои файлы увидел, что в них

\usepackage{type1cm} % scalable fonts
\usepackage{lettrine}

причём всё это после всех бабелей и енкодингов… Где же я использовал
fix-cm? Где-то было, извиняюсь, значит я благополучно всё позабыл.
Правда, там в комментариях про буквицы ссылка есть:
http://pastebin.com/f4de90c04

А вот из документации к lettrine:

Important notice: the sizing works fine with fully scalable fonts (like the stan-
dard PostScript fonts), but might not work well with CM/EC fonts which have
two limitations:  only a limited number of sizes is available by
default (precise
adjustments  are  impossible),  and  the  largest  size  (25pt  or
35pt)  is  often  too
small. The CM fonts are now available in PostScript type1 format for free (cour-
tesy  of  BlueSky/Y&Y),  to  make  them  fully  scalable,  it  is
mandatory  to  add
\usepackage{type1cm} in the preamble of your document.   The EC fonts are
also available in type1 format for free (thanks to Vladimir Volovich,  they are
called cm-super), and adding \usepackage{type1ec} 2 in the preamble will make
them fully scalable too.   So, if you want lettrine.sty to work properly with
CM or EC fonts, you will need PostScript versions of these fonts and one of the
packages type1cm.sty or type1ec.sty.

The newly released LM fonts, which should replace both CM and EC fonts sooner
or later, are fully scalable, so, if you have them installed, you
should use them
instead of CM or EC fonts.  \usepackage{lmodern} is the command to switch
them on (add \usepackage[T1]{fontenc} when composing in one of the western
languages other than English in order to get proper hyphenation).
You can also consider using one of the standard PostScript fonts
(Palatino, Times,
Utopia. . . ), they are fully scalable too!

Попробуйте \usepackage{type1ec} или \usepackage{type1cm}, должно помочь.