diff -ur root-5.28.00h.orig/core/base/doc/macros/fonts.C root-5.28.00h/core/base/doc/macros/fonts.C
--- root-5.28.00h.orig/core/base/doc/macros/fonts.C	2011-11-24 17:12:40.000000000 +0100
+++ root-5.28.00h/core/base/doc/macros/fonts.C	2012-02-14 00:37:48.275434352 +0100
@@ -16,7 +16,9 @@
 
 void drawtext(double x, double y, int f, char *s)
 {
-   TLatex *t = new TLatex(x,y,Form("#font[41]{%d :} %s",f,s));
+   std::stringstream ss;
+   ss << "#font[41]{" << f << " :} " << s;
+   TLatex *t = new TLatex(x,y,ss.str().c_str());
    t->SetTextFont(f);
    t->SetTextAlign(12);
    t->SetTextSize(0.048);
diff -ur root-5.28.00h.orig/tutorials/tree/cernbuild.C root-5.28.00h/tutorials/tree/cernbuild.C
--- root-5.28.00h.orig/tutorials/tree/cernbuild.C	2011-11-24 17:12:38.000000000 +0100
+++ root-5.28.00h/tutorials/tree/cernbuild.C	2012-02-14 00:38:20.027019394 +0100
@@ -22,7 +22,7 @@
    TString dir = gSystem->UnixPathName(gInterpreter->GetCurrentMacroName());
    dir.ReplaceAll("cernbuild.C","");
    dir.ReplaceAll("/./","/");
-   FILE *fp = fopen(Form("%scernstaff.dat",dir.Data()),"r");
+   FILE *fp = fopen((dir+"cernstaff.dat").Data(),"r");
 
    TFile *hfile = 0;
    if (get) {