viewing contribution tab with soft contribution causes ambiguous field SQL error

Nb. using civicrm-3.2.beta3-drupal.tar.gz (and with previous beta)

I added a contribution on an Individual, marked it as a soft contribution for an organisation. View the contribution, click the link to the company, click Contributions tab.

Here's what's displayed:

DB Error: a515ac9c2796ca0e23adbe92c68fc9fc

Database Error Code: Column 'currency' in field list is ambiguous, 1052

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Error Details:

Array
(
[callback] => Array
(
[0] => CRM_Core_Error
[1] => handle
)

[code] => a515ac9c2796ca0e23adbe92c68fc9fc
[message] => DB Error: a515ac9c2796ca0e23adbe92c68fc9fc
[mode] => 16
[debug_info] => SELECT SUM(amount) as amount,
AVG(total_amount) as average,
currency
FROM civicrm_contribution_soft ccs
LEFT JOIN civicrm_contribution cc
ON ccs.contribution_id = cc.id
WHERE cc.is_test = 0 AND
ccs.contact_id = 49
GROUP BY currency [nativecode=1052 ** Column 'currency' in field list is ambiguous]
[type] => DB_Error
[user_info] => SELECT SUM(amount) as amount,
AVG(total_amount) as average,
currency
FROM civicrm_contribution_soft ccs
LEFT JOIN civicrm_contribution cc
ON ccs.contribution_id = cc.id
WHERE cc.is_test = 0 AND
ccs.contact_id = 49
GROUP BY currency [nativecode=1052 ** Column 'currency' in field list is ambiguous]
[to_string] => [db_error: message="DB Error: a515ac9c2796ca0e23adbe92c68fc9fc" code=0 mode=callback callback=CRM_Core_Error::handle prefix="" info="SELECT SUM(amount) as amount,
AVG(total_amount) as average,
currency
FROM civicrm_contribution_soft ccs
LEFT JOIN civicrm_contribution cc
ON ccs.contribution_id = cc.id
WHERE cc.is_test = 0 AND
ccs.contact_id = 49
GROUP BY currency [nativecode=1052 ** Column 'currency' in field list is ambiguous]"]
)