Merge Cells bug?

Is there a limit to the number of merge cells that can used. Every time I get past around 1027 merged cells the created file will no open correctly. I get an error about unable to read the file twice, then excel opens with a repaired version of the file. All formatting and a lot of the data is missing.
Thanks for any help in this matter.
Kevin

Dear Kevin,

Thanks for your consideration.

It’s a bug. I did not think of creating so many merged cells in a worksheet. Please wait for a few days. I will fix it as soon as possible.

How long do you think this fix may take?

Dear Kevin,

This weekend or early next week.

Can you be waiting for that?

That would be great. Sooner the better of course. Thanks.

Dear Kevin,

Please download Hot Fix 1.5.9.

Thanks for the quick fix on this one.