RadButtonElement shows its border when it is in a button group where ShowBorder is false. It seems like there is an issue in the ForceReapplyStyle method.

Wrapped text in bullet point paragraph is not aligned correctly.

If you compare the G-mail-like labels in the HelpDesk sample application, you will notice that while in Q1 2010 they look good, in Q3 2010 SP1 there is an issue with the way they are painted. Most probably the reason is in the RoundRectShape.

One should not be able to trigger a shortcut if the element that has the shortcut assigned is disabled.

ToolTip should be located close to the mouse cursor

Set Color.Orange to the border of the RadDropDownList when it is in ContainsFocus state. You will notice that the border of the control becomes orange event if it is not focused.

If you place a control in RadHostItem and you put this host item in a parent element, the parent element will not be resized correctly, because the RadHostItem will not provide the correct size.

ColorAnimationStepConverter throws exception when system list separator is not comma.

When creating a shortcut, without modifier key (for example F5), the text displayed next to the menu item (describing the shortcut )  is incorrect (it shows " + F5", instead of "F5").

RadOffice2007ScreenTipElement tip = new RadOffice2007ScreenTipElement();
tip.EnableCustomSize = false; //this enables custom size

In order to enable custom size the setting should be tip.EnableCustomSize = true;. The flag is incorrect.

When RadScreenTip is shown for a control which resides in a non-active form, the form of RadScreenTip shows a button in the taskbar.

If you set the GenerateMember of an element to false, it generally removes 'this' from the serialized code concerning the element. However, in the cases where we have a serialized cast in the designer, the word 'this' remains. Since the element is not a member of the form/user control, we get a compile error.

TextAlign property at RadTextBoxItem is not serialized at design-time.

If you try to load a predefined theme in your project and run the project without a debugger, you may get a missing resource exception. The solution to this issue is:
Assembly lAssembly = Assembly.GetAssembly(typeof(Telerik.WinControls.Themes.Office2010Theme));   
Telerik.WinControls.ThemeResolutionService.LoadPackageResource(lAssembly, "Telerik.WinControls.Themes.Office2010.tssp");

Let's have two controls - RadLabel and RadCheckBox and a form, anchored to Bottom, Right. Show a form containing these controls in maximized mode and you will notice that the controls' location is not correct.

Host a Panel in RadHostItem and set the BackColor of the Panel. You will notice that the color set is not applied.
NOTE:   These properties should be set to the RadHostItem
//Synch inheritable properties
this.hostedControl.ForeColor = this.ForeColor;
this.hostedControl.BackColor = this.BackColor;

RadTabStrip, RadToolStrip and RadTreeView still can get the focus if validating event is cancelled.

When you place several editor instances in a FlowLayoutPanel, for example RadTextBox, RadComboBox, RadDateTimePicker and set their Width to 100, this setting is lost when you run the project.

When you try to set a value to the ToolTipText property of a RadItem (let's say RadButtonElement), this setting is not serialized in the designer.

When the user disables RadRibbonBarGroup and there is a RadTextBoxElement in it the textbox part of the RadTextBoxElement is not disabled.