Images in EditCommandColumn Not Displaying Properly

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I am using an EditCommandColumn to Edit/Update/Insert records but when I use custom images instead of the default text, there is an unnecessary line break between the Update/Cancel images in Edit Mode as well as the Insert/Cancel images in Insert Mode. If I leave the default they display side by side. I am not specifying a header or item width and even if I do, I get the same results. The column widths are adjusting as necessary when I am using text. I can't seem to find any properties in the column to set any sort of image display layout.

<telerik:GridEditCommandColumn  ButtonType="ImageButton" EditImageUrl="images/edit.gif" UpdateImageUrl="images/update.gif" InsertImageUrl="images/update.gif" CancelImageUrl="images/delete.gif"></telerik:GridEditCommandColumn>

Any ideas?