Thanks for all who responded.
I check for updates frequently and apply as soon as they are offered. That does not help, however. Disappearance of tales on the object class selection tree happens now and then, no matter what I try to do.
It's Windows (XP) where there's the problem. I haven't noticed that on Linux. However, I have to use it on Windows because of several reasons anybody could guess, and it's not only me. I have to help and to support a number of customers needing the tool although not having Oracle knowledge as their primary skill (and still being programmers or testers). I often advise them to roll back to SQL Developer 2, altogether that actually isn’t a solution, moreover since they aren’t fixed in the project – somebody goes and somebody comes, that sort of things.
Edited by: Uldis Pavuls on Nov 9, 2011 5:51 PM