jEdit 4.3pre17, FTP plugin 0.9.5, SSH console 1.0.1
Open a remote file over SFTP (e.g. sftp://server:22/home/user/file.txt). Select "Search" -> "Search in directory", enter some text to search for, click "Synchronize", check "Hypersearch" and click "Find". Answer "Yes" in the warning message box. On the remote machine watch the process list. Every time a new search is performed a new sshd process is spawned and stays there until jEdit exits. Java heap also grows noticeably, so apparently the SFTP connections are not closed (or released to the pool).