Platform update may have effected dates?

An application that was working perfectly for months stopped working today around 9:30 am NY time. At this same time, the app started to experience a very long duration upon submit actions. 
After spending hours diagnosing things (the logs did not show any errors), I decided to remove this bit of code (submit action)

1. if((input.DELIVERY   ==  zoho.currentdate)  && (input.REMINDER  ==  null))
2. {
3. // some code that sends an email
4. }

to

1. //some code that sends an email

and observed two things: 1) The code now works 2) The very long delay we started seeing was gone.
Both variables above are date-only fields. 
Any ideas?
Cheers,
John Whitney

Read More