I'm not sure whether it's linux Mint's bug or if it's bug in Opera, so I report it here. I have mounted NFS share, this I use for storing any multimedia, but if I try to save any file on it through the "Save linked content as" option in Opera it freezes opera for 2 minutes no matter how big the file was, the same goes with uploading a file through the "Open File" dialogue. With firefox everything works fine. In other distros like Ubuntu 10.04 or 9.10 this bug isn't present.
Thanks for help