Hello,
Thank you for contacting us.
This problem is already known to us and we tried to make the Branch/Tag dialog more easy to use and it will be included in the next release of Syncro SVN Client.
To have this working correctly, after selecting the target folder you must specify a name of a folder that does not exists (SVN requires a non-existing folder name) and the copy will be made inside that folder, which it will be created by SVN.
For example, if you select as target folder "http://server/root/path/to/repository/newFolder" then in the Branch/Tag dialog you have to add in the "To URL" field the name of a non-existing folder to be created by SVN, as in the following:
"http://server/root/path/to/repository/newFolder/non_existing_folder_name"
The non_existing_folder_name will be created by SVN and this will be the real target that will be used to create the branch/tag into.
If you wish to create the branch/tag into the newFolder, then do not create it using the dialog that allows you to browse the repository, only select the parent of it and append the "/newFolder" in the "To URL" field to be created by SVN when creating the branch/tag.
Do not hesitate to contact us in case you need additional information.
Best regards,
Florin Avram
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Syncro SVN Client
http://www.syncrosvnclient.com