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If you are migrating from 1.3 to 1.4, simply replace getModel() calls with getDefaultModel() wherever your compiler indicates an error for this change.
FileUploadField - now requires model
The FileUploadField now REQUIRES a model. This means that if you previously used the ID-only constructor (i.e. new FileUploadField("myFileField")), you will need to change it to include a model (i.e. new FileUploadField("myFileField", new Model<FileUpload>())). Of course, if you don't do this, FileUploadField will look for a CompoundPropertyModel up the tree as other components do.
Spring Support
Spring Modules
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