After further investigation, this occurs on pretty much every element of the web interface. I switched back all the way to 4.0.4 and I see the same thing on all versions.
My guess is that the web interface uses some php methods that are no longer available in version 5.3 of php.
Unfortunately, our site uses mysqlnd, a feature of 5.3, so we cannot switch back to 5.2.
We shouldn't, however, have to switch back to 5.2, as LSW should start preparing for more clients to switch to 5.3 in the future and become compatible with it.
It shouldn't take but a few changes in the LSW admin php code to comply with the changes, which would be backwards compatible with anyone who uses other versions of php, such as 5.2.
I am going to start a new thread on this subject.