Well, after a bit more research, it happens to other controls as well. It looks like the Resize event of the UltraPanel (or ChildPanel) is being eaten and not passed to child controls... The panel itself resizes with form (tried changing background color to something different), so it's docking is ok.

Hopefully there'll be a quick fix for this..

caco

Hello,

This behavior is already logged with our developers in our tracking system, with an issue ID of 48091. I will let you know as soon as this behavior is fixed.

If you need any other assistance please do not hesitate to ask.

Hello,  I'm checking in to see if there is any news on a fix for this issue on the horizon.  or is there any kind of work around I can use?  This turns out to be quite a big bug for me, as I use the autoscroll panel as a host for many controls

Hmmm... you really want us to wait 4 more weeks for the fix????

Hello all,

I have double check that this fix is included in the new release 10.3. So for the older version we should wait for the service release coming in a few weeks. I can suggest a case to be opened mentioning this issue, so Developer support will be able to create you Untested build before the planned date.
    
Sincerely,
Dimi
Developer Support Engineer
Infragistics, Inc.

Hello,

Just ot let you know that this issue is fixed in all versions after NetAdvantage 2009 volume 2.

Please let me know if you need any further assistance.

Hello Dimi,

I can confirm that the issue is fixed in 10;3. For me it's good, because I've already updated to 10.3 on all relevant projects, so I won't be waiting on 10.2 SR. 

Thanks,

caco