Hinted by Сергій Матрунчик (aka SkyMan) in comment 2 on bug #635289 (which appears unrelated) I discovered that running Netbeans under sudo makes things "work" again - needless to say this is not a sustainable solution... But could work for searching souls while we wait for a fix...
So perhaps it's really a permissions (or apparmor?) problem?
Hinted by Сергій Матрунчик (aka SkyMan) in comment 2 on bug #635289 (which appears unrelated) I discovered that running Netbeans under sudo makes things "work" again - needless to say this is not a sustainable solution... But could work for searching souls while we wait for a fix...
So perhaps it's really a permissions (or apparmor?) problem?