[Plugin: GRAND FlAGallery – Best Photo Gallery] Deprecated Php errors, XML errors

I’m having continuing conflicts between this plugin and one or two others.
The error messages always refer to this plugin. Here are the latest:
(I’ve removed the first part of the server path in the error msgs below)

Deprecated: Assigning the return value of new by reference is deprecated in …/public_html/wp-content/plugins/flash-album-gallery/lib/flag-db.php on line 658

Deprecated: Assigning the return value of new by reference is deprecated in …/wp-content/plugins/flash-album-gallery/lib/flag-db.php on line 658

Warning: Cannot modify header information – headers already sent by (output started at …/public_html/wp-content/plugins/flash-album-gallery/lib/flag-db.php:658) in …/public_html/wp-includes/pluggable.php on line 866

Couldn’t load the Main XML file.Error #1088

The one plugin I believe is conflicting with is “Event Registration”… but I don’t get errors relating to that plugin, just to GRAND FlAGallery.

I’ve deleted and re-installed both plugins, both are up-to-date.

Any suggestions?
Site: http://theclayunderground.com

(I’ve turned off the Event Registration plugin temporarily.)

Thanks for any assistance!

http://ww.wp.xz.cn/extend/plugins/flash-album-gallery/