I have noticed that, after switching themes, the tooltips in our application do no longer work correctly. I was able to reproduce the issue in the following two DOJOs:
The only difference between those two is the stylesheet to be loaded (line 6).
Steps to reproduce:
In step 4, the correct behavior would be displaying the tooltip in the same fashion as in step 2. However, in the faulty DOJO, it can be seen that the tooltip does not expand past the width of the text that is displayed when hovering over the green dot. This means that when displaying long tooltips after short ones, they are always wrapped unnecessarily.
A way to fix this behavior (and what's actually the difference between the two stylesheets) is to set the position on the ".k-animation-container" back to its default value "static". Usually, this value is overridden by the output of the size calculations, but during the calculations this value comes to play.
This third DOJO demonstrates the fix described above.
Please note that when using the default-ocean-blue stylesheet, the positioning of the callout seems to be broken as well.