# [pdftex] Collision colorstacks of pdftex-1.40.1 and beamer/pgf?

Heiko Oberdiek oberdiek at uni-freiburg.de
Mon Jan 15 14:14:21 CET 2007

```On Mon, Jan 15, 2007 at 06:29:44AM +0200, Victor Ivrii wrote:

> I discovered a strange problem with beamer and pdftex 1.40.1 which was
> not around with 1.30 (not tested with 1.40.0): starting from the
> really large page (slide) [something around 170] the textcolor in the
> body becomes transparent (not the case with other colors, like cvolor
> inside of the theorem, and the only solution I discovered so far is to
> put \color{black} at each frame or sometimes even after each \pause. I
> observed it with two long talks I tried. However in the latest run it
> happened even on page 20!
>
> http://www.math.toronto.edu/ivrii/beamerwoes/