Description of problem:

When starting an instance of TBrowser, root complains of a version mismatch for libpng

Version-Release number of selected component (if applicable):

root-graf-asimage-5.32.03-1.fc17.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Create a root script which generates a .png file e.g. create_png.C:
void create_png() {
   TCanvas *c = new TCanvas();
   TText *t = new TText(.5,.5,"test");
   t->Draw();
   c->SaveAs("test.png");
   c->SaveAs("test.gif");
}

2. root create_png.C
  
Actual results:
libpng warning: Application built with libpng-1.2.44 but running with 1.5.10
Info in <TCanvas::Print>: file test.png has been created
Info in <TCanvas::Print>: GIF file test.gif has been created

Indeed two files are created, test.png and test.gif. The .gif file has the expected content, but the .png file has zero length.

Expected results:

A .png file which looks like the .gif one.

Additional info:

libpng-1.5.10-1.fc17.x86_64 is indeed installed on the system, but libpng-1.2.44 is not. The error message is produced by libpng itself. There is, however, /usr/lib64/libpng12.so.0.49.0 which belongs to the libpng-compat package, which is required by libAfterImage-devel-1.20-2.fc15.x86_64 and libAfterImage-devel is a BuildRequires for root.

Workaround: start root with:
 LD_PRELOAD=/usr/lib64/libpng12.so.0.49.0 root

Note, that I get the same error (with the same 1.2.44 version), whether I use the official fedora-update version or if I build it myself on a system which does not have version 1.2.44!