mysterious occurence of an annoying folder icon next to "creator", "year" and "+"

Hi,
since a couple of hours a small folder icon appears next to "creator", "year" and "+" (number of child items) in the middle window of Zotero. I have never seen this icon before and the only function function seems to be that it shows whether the child items are visible or whether this item is collapsed (hence the same as the -/+ next to the title). This icon is extremly annoying since it appears three times for every reference and does not make any sense. It simply takes away space.

Can somebody explain to me what happend? Is their an other purpose of this icon? Why did it occur so suddenly even though I have used Zotero for some time now?

Best.


ps: I can also provide an screenshot...
  • Why did it occur so suddenly even though I have used Zotero for some time now?
    You installed the iMacros Firefox extension.
  • I've contacted the creators of the iMacros extension and asked them to fix the problem (which is due to some overly vague CSS rules in their extension).
  • This is now fixed in iMacros 6.0.5.3.

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