Hello John M,
Would you please confirm that you are using the latest version of RadControls as selected? I have seen the first issue (with the border) in an old release and it is now fixed. As to the second problem, this could happen for load on demand, under IE8 and if no explicit size is set which is not the case. Nevertheless, I recommend to set explicit width and test again.
I also built up a test demo based on your explanations and code but I could not reproduce the problem. I attached it to the thread for your reference - if the problem persists, let me know how to modify it and what steps to follow to observe the issue and I will do my best to help.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items