Close and reopen Netscape as a workaround until they issue a new version.
Seems like a valid workaround.
Let me comment that many people today expect perfect software. My feeling is that they'll have to wait a few more years.
After upgrading to 7.2 (from 6.2) Netscape will "disconnect" when minimized and inactive for a period of time (anywhere from 20-60 minutes). My DSL internet connection is not dropped, as power-cycling the modem does not help. I must close Netscape then re-open it and all is well. This does not occur with IE so it must be something in Netscape.