Akismet conflict: Unsupported operand types in includes/common.inc on line 1430

Hi,

I get the following error when I modify the "Publish on" field of a node. I tried submitting a node from scratch and editing a already created node. Th result is the same in both cases.

I've a block listing scheduled items which have not been published yet. Even if I get the above error, the node is listed in the block. But the "publish on" date in the table is empty.

When I try to re-edit the node, I see that the "Publish on" field is empty. And I cannot even if I do not change anything, when I press the Save button I get the above error message.

So, once I "touch" the "Publish on" field of Scheduling Options, I keep getting the error message whenever I try to edit that node (even if I do not edit the scheduling options).

Now, just before submitting this issue I remembered that I recently enabled Akismet module. So I tried once more with that module disabled, and the problem disappeared. So, this is obviously a conflict between the two modules.

Could you please have a look at the issue and advise about the next step. Should I also submit an issue at Akismet module or is this a Scheduler problem?

Thanks in advance.