http://bugs.winehq.org/show_bug.cgi?id=4144
------- Additional Comments From a_villacis@palosanto.com 2006-13-03 16:29 ------- err:ole:ITypeInfo_fnInvoke failed to convert param 0 to VT_VARIANT from VT_I4
This might be related to bug 4370 and bug 4502. They show a very similar message. Bug 4370 even points to the offending patch.