FYI this still does this when making category titles in 5.62
At the adminlog it shows as: Added a category: \\\'Test\\\'
... though at index page the category title shows as \'Test\'
I can then edit category > manually remove slashes, and it comes out right.
One other thing I found out during photo upload even with the above fix applied ...
I temporarily changed the number of upload prompts to 20 to upload a batch of pics per category.
All photos had Titles: Plant species 'Cultivar'
After choosing 20 files > submit
The first 10 photos processed were fine - photo titles: Plant species 'Cultivar'
The next 10 photos processed (at bulkupload preview) all photo titles displayed Plant species \'Cultivar\'
... I had to manually edit each title > process > to correct this.