API Problems in 3.24

After upgrading routers to 3.24 the api never returns after login, I can see in the log that the api user logged in but the connection just hangs, I have been using this script to monitor wireless connections for long time and the only change was the upgrade to 3.24, It works fine on the routers I have not upgraded. Is anyone else having this problem, or has something change in the api in 3.24 that I missed?

Thanks
-John

After looking closer, I come up with this:

/interface/print - Works!
/interface/wireless/print - Works!
/interface/wireless/registration-table/print - Hangs!

Any ideas?