You mean on VS.NET's property browser? I have a understanding that it doesn't reflect changes made in code of the control but only what it is on the declarative syntax and what the property itself gives (like DefaultValue attribute etc). So just looking at the property browser on this kind of scenario, doesn't tell the thruth.
Besides, false is default value for AllowCustomPaging property.
Thanks,
Teemu Keiski
Finland, EU