This is an incompatibility found in CVS. Since Bamboo runs checkouts using the "-D" option, the problem will always happen for CVS tags.

Example that fails (using a Tag):

checkout -P -N -kb -r TAG-001 -D '2010-07-28 08:34:20 +0200' build

Example that works (using a Branch):

checkout -P -N -kb -r BNCH-001 -D '2010-07-28 08:34:20 +0200' build

The workaround is to use option -DCVS_FORCE_CHECKOUT_TO_LATEST=true in the JAVA_OPTS.

A fix for Bamboo would be to:

1. Always force the checkout to happen in the latest version (without "-D")

OR

2. Detect if the Plan owner used a Branch or Tag. If a Tag, request for confirmation that a force latest checkout can be done (explain potential performance issues).