GD 2.0.4's gd_io header uses gd_free instead of free in its gdIOctx structure.. This affect phproot/ext/gd/gd.c and phproot/ext/gd/gd_ctx.c.. A mere 5 replacements must be done...

The following terribly simple patch can be applied, if anyone's lazy.. :P

diff -Naur php-4.2.3/ext/gd/gd.c php-4.2.3-gd2-2.0.4/ext/gd/gd.c
--- php-4.2.3/ext/gd/gd.c       2002-09-03 15:09:29.000000000 +0200
+++ php-4.2.3-gd2-2.0.4/ext/gd/gd.c     2002-11-11 21:35:30.000000000 +0100
@@ -1011,10 +1011,10 @@
                io_ctx = gdNewDynamicCtx (8, data);
                if (io_ctx) {
                        if (getmbi(gdGetC, io_ctx) == 0 && skipheader(gdGetC, io_ctx) == 0 ) {
-                               io_ctx->free(io_ctx);
+                               io_ctx->gd_free(io_ctx);
                                return PHP_GDIMG_TYPE_WBM;
                        } else
-                               io_ctx->free(io_ctx);
+                               io_ctx->gd_free(io_ctx);
                }
        }
 #endif
@@ -1206,7 +1206,7 @@
                } else {
                        im = (*ioctx_func_p)(io_ctx);
                }
-               io_ctx->free(io_ctx);
+               io_ctx->gd_free(io_ctx);
 #endif
        } else {
                if (image_type == PHP_GDIMG_TYPE_GD2PART) {
diff -Naur php-4.2.3/ext/gd/gd_ctx.c php-4.2.3-gd2-2.0.4/ext/gd/gd_ctx.c
--- php-4.2.3/ext/gd/gd_ctx.c   2001-08-05 18:21:29.000000000 +0200
+++ php-4.2.3-gd2-2.0.4/ext/gd/gd_ctx.c 2002-11-11 21:35:37.000000000 +0100
@@ -67,7 +67,7 @@
                ctx = emalloc(sizeof(gdIOCtx));
                ctx->putC = _php_image_output_putc;
                ctx->putBuf = _php_image_output_putbuf;
-               ctx->free = _php_image_output_ctxfree;
+               ctx->gd_free = _php_image_output_ctxfree;

 #if APACHE && defined(CHARSET_EBCDIC)
                /* XXX this is unlikely to work any more thies@thieso.net */
@@ -95,7 +95,7 @@
                        break;
        }

-       ctx->free(ctx);
+       ctx->gd_free(ctx);

        if(fp) {
                fflush(fp);