==== How to reproduce: ====
Convert the SVN repository of the grizzly project (instructions here https://grizzly.dev.java.net/source/browse/grizzly/ , you may need to register at java.net before having read access).
Search for a tag "1_9_18k". In the SVN repository, there is such a tag (see https://grizzly.dev.java.net/source/browse/grizzly/tags/ for a complete list of tags).
==== Expected result: ====
All tags (including tag "1_9_18k") are converted.
==== Actual result: ====
Only some tags are converted correctly (e.g. tag "1_9_18a"), others are not converted.