In the last builds of Pharo8, CatalogBrowser comes with an easily fixable glitch... Please could someone take a look? My humble suggestion is:

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createRepositoryURLtoNameMappings
������ "Return a mapping between repositories URLs and their user names"

������ <script: 'self createRepositoryURLtoNameMappings inspect'>
������ |repos|
������ repos := Dictionary new.������
������ 3 to: SystemVersion current major do: [:v |
������ ������ repos ������
������ ������ ������ at: ('http://smalltalkhub.com/mc/Pharo/MetaRepoForPharo{1}0/main' format: (Array with: v))
������ ������ ������ put: ('Pharo{1}.0' format: (Array with: v)].
������ repos at: 'http://www.squeaksource.com/MetacelloRepository' put: 'Unsorted'.������ ������
������ ^repos

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Best wishes,

Casimiro Barreto