I work with an Linux installer from the beta branch.
When is use the multilabel segmentation tool for 3D+t images the Workbench will crash when I double-click a segmentation label in the multilabel segmentation plugin.
The workbench will then terminate with the error message: "Dimension 4 is not in (2)(3)"

To reconstruct this error do as follows:

• open mitk Workbench
• load a 3D+t images (error does NOT occur for 3D images!)
• open the multilabel segmentation plugin
• create a new multilabel segmentation session
• and create a segmentation label for this session

this label will now be listed on the right under: "number of labels: 1"

• double click this label

-> Crash

This error occurred when I had several labels created and wanted to change the "active" label. Therefore I can imagine that this is a bug that might occur quite frequently when using the multilabel segmentation tool.

<3