Hmmm, interesting. Now I've got:

  DB<23> x $_
0  'ActionLogs.1.2.3.4.5.6.7.8.9.xml'

  DB<24> x /(\d+\.)/g
0  1.
1  2.
2  3.
3  4.
4  5.
5  6.
6  7.
7  8.
8  9.
[download]

but:

  DB<25> x /(\d+\.)+/g
0  9.
[download]

Can anyone tell me why the quantifier makes it match only the last group?