There are three constructed translatable strings that can be difficult to translate in some languages. The code is this:

 /* translators: this is followed by the "while ..." strings some lines
  * down this file.
  */
 str = g_string_new (_("There has been an error "));

 if (page_num == PAGE_IMPORT)
   /* translators: this follows the "There has been an error " string */
   str = g_string_append (str, _("while importing the accounts."));
 else if (page_num >= PAGE_ENTER_CREATE &&
     priv->first_resp == RESPONSE_ENTER_ACCOUNT)
   /* translators: this follows the "There has been an error " string */
   str = g_string_append (str, _("while parsing the account details."));
 else if (page_num >= PAGE_ENTER_CREATE &&
     priv->first_resp == RESPONSE_CREATE_ACCOUNT)
   /* translators: this follows the "There has been an error " string */
   str = g_string_append (str, _("while creating the account."));

I already asked for a string freeze break request to address this problem.