If a user uploads a binary item to a multimedia schema in Tridion is there a limit on the size of the file that may be selected?
There are some limits...
- WebDav limits uploads (by default) to 4 MB (see the documentation for details on how to change this).
- IIS may block by default uploads of files over 30MB (not sure if this still applies, can't find references in the documentation).
- HTTPUpload will (again, by default) limit upload sizes to 10MB for publishing packages.
All these values can be modified, Tridion itself doesn't have a "hard" limit to file sizes, but you should know that large files have an impact on the underlying infrastructure (network, deployers, databases).