Ice 3.7.5 maintains full source and binary compatibility with Ice 3.7.0-3.7.4: you can upgrade your application from Ice 3.7.0-3.7.4 to Ice 3.7.5 without recompiling or relinking anything.
The database formats used by Ice services such as IceGrid and IceStorm have not changed, therefore no database migration is required. Generally speaking, you are free to use any combination of Ice 3.7.x applications and Ice services.
Some internal Ice interfaces may change in a patch release such as Ice 3.7.5, and therefore you must always upgrade all the Ice components of a given application together. For example, you should not use version 3.7.5 of the
ice37.dll with version 3.7.1 of the
icessl37.dll in the same application.