More an more people are embracing the Extension Library for 8.5.3. I have posted a question on the project page on OpenNTF.
I am wondering how much an upgrade will affect all clients? (server, designer, normal user)
Do I have to upgrade all environments or can they happily live with each other as long as I do not use the new controls?
Our upgrade path looks normally as followed:
- upgrade Development environment
- upgrade Designer clients
- upgrade Test environment
- upgrade Production environment
- upgrade Normal clients
We are now at 8.5.2 and wonder if we break something when upgrading Development already to 8.5.3 and start rolling out the first applications to Test and Production… ?
After an x number of years working in the same environment I have decided to look for a new challenge. Are you looking for a smart companion?

Howard said
I think there are two paths for the Ext Lib now, an 8.5.2 and 8.5.3 path. You would want to install the 8.5.2 version if your servers will be at 8.5.2.
Patrick Kwinten said
fear so too, but not anyone tested a mixed environment?