Just a note, since 60455 the following Athens no longer fails 30 seconds later...

| view form1 form2|
view  := AthensSceneView new.
form1 := UIThemeWatery new scrollbarThumbHorizontalMiddleForm.
form2 := UIThemeWatery new scrollbarThumbVerticalMiddleForm.
view scene: [:canvas |
    canvas surface clear:  Color black.
    canvas setPaint: Color white.
    canvas drawShape: (0@0 corner:300@300).
    (canvas setPaint:form1) repeat.
    canvas paintTransform restoreAfter:[
        canvas paintTransform translateBy:10@144.
        canvas drawShape:(10@144 corner:290@157).
    ].
    (canvas setPaint:form2) repeat.
    canvas paintTransform restoreAfter:[
        canvas paintTransform translateBy:144@10.
        canvas drawShape:(144@10 corner:157@290).
    ].
].
view openInWindow.

Thanks for your efforts Eliot and Esteban.

(btw That was a side issue from...
https://pharo.fogbugz.com/f/cases/14813/Wrong-size-for-Athens-surface-pattern-paint-from-a-Form)