Upgrade to 1.5 Error stating Albums create are out of date,

<Help please,
I receive this message
The following albums in your gallery were created with an older version of the software and are out of date.
This is not a problem!

We can upgrade them. This may take some time for large albums but we'll try to keep you informed as we proceed.
None of your photos will be harmed in any way by this process.
Rest assured, that if this process takes a long time now, it's going to make your gallery run more efficiently in the future.

Progress:
Album: all
Upgrading album properties...
Fatal error: Cannot unset string offsets in D:\Abyss\htdocs\galleryphy\classes\Album.php on line 481

I have this same message on all albums.

How do I fix this without rebuilding albums??

Thanks Transco :D : >
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The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):
Gallery version: 1.5
Apache version:
PHP version (don't just say PHP 4, please): 5.0.3
Graphics Toolkit: ImageMagick
Operating system: XP Sp2
Web browser/version (if applicable):