Input mask issue

Hi,

in ALM 11.52 I defined a defect user field of type String with the input mask 00.000.000000. On client and server machines all regional settings are set to German language (incl. system locale). Unfortunately the values of this user field look like 12,345,6789012 (instead of 12.345.6789012).
In QC 10.00 the input mask worked fine. Any ideas anybody? Thanks!

Best Regards
Christoph