Graph edit problem

[beam]

When i create new graph, everything is OK.
But if i want change title of graph, i cant see graph no more, because values of "Inbound Data Source", "Outbound Data Source" are NONE and if i click to save, title is saved and data source are changed to NONE and it is problem. (screen is in attachment) Does anybody know how to resolve this problem?

Tested on PHP4.3.11/PHP5.0.4 & FreeBSD 5.4/Win XP SP2 & Apache 2.0.54 & MySQL 4.1.12

Sorry for my pure english.