Muzik, Thanks, I hope you are right.
I don't have my housing yet because I had it shipped to my daughter who lives in the States. I live overseas. My daughter verified that the serial number on my housing pre-dates the UC24000 serial number, so apparently will not have the fix. But I do not know if my housing will have the same problems that others have described since my housing is with my daughter. She is traveling here in 10 days so I'll have it then.
From all I have read here and elsewhere, it does sound as though Ikelite has great customer service. I will let you know how it goes for me.