Not sure if this is a real bug or it only happens to me, and if it is, whether it's been reported...
When I open the MorphologicalTransformation for the first time during a session, the slider for Amount has a value of 1.00 (which is fine) but the slider "handle" is nowhere in sight. I have to drag over the slide from right to left a few times (or just enter a small value in the box), then the value goes down and eventually the handle appears around the 0.78 value. Likewise, if I need to drag the handle back to a value over 0.78, I need to drag it out of the dialog box (you stop seeing it, but can drag it in/out to alter the value). Not sure if this explains it well...
This is with PI SE, 01.05.09.0561 eng (x86_64) on Win7x64
