3.0.9->3.0.11 Bug. How to find problem?

After I upgraded from 9 to 11, my php script stopped functioning correctly, Since we are in a production environment, I had to drop back. I looked at where it stopped running, here is the code. Cant see any problems, and this works with v3.0.9 for($i=0; $i<$weeksToDisplay; $i++){ $font_color = "#FFFF00"; $dummy=$numberz[$qtyAvailRow][$i]; if($dummy < 0){ $font_color = "#F66666"; } echo "<td bgcolor=\"$font_color\"align=right><b>$dummy</td>\n"; } echo "</tr>\n"; with $weeksToDisplay=6, $qtyAvailRow=6, it stops after 4 iterations through it. HTML that came out looks like this. <td bgcolor="#FFFF00" align=right><b>77598</td> <td bgcolor="#FFFF00" align=right><b>92247</td> <td bgcolor="#F66666" align=right><b>-33818</td> <td bgcolor="#FFFF00" align=right><b>120520</td> No error, no warning, no clue. Im at a loss here. the $numberz array is a multi-dimensional array cleanly initialized to 0 at the start. This seems to be something broken between v9 and v11. If anyone can help me put php in "debug" mode, I'd send in something usefull to whoever can work their magic here. Thanks Can you reply to me, as well as the list. Im not subscribed here. Thanks Robert