When restoring a 1GB+ backup, the following error is produced. The link for more information goes to an empty page. There are serveral forum posts where others are receiving the same error, but no resolution, so I am submitting this as a bug. Others seem to have the problem restoring from 2.0 backups as well.

error/tmp_backup_directory_not_found

More information about this error
Stack trace:

line 92 of \backup\util\helper\convert_helper.class.php: convert_helper_exception thrown
line 242 of \backup\util\helper\backup_general_helper.class.php: call to convert_helper::detect_moodle2_format()
line 188 of \backup\util\ui\restore_ui_stage.class.php: call to backup_general_helper::detect_backup_format()
line 62 of \backup\restore.php: call to restore_ui_stage_confirm->display()