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Version 5.2 or greater is strongly recommended.

You should consider disabling magic_quotes_gpc. For more information See #25 of the Zenphoto troubleshooting guide.

Setting mbstring.internal_encoding to UTF-8 in your php.ini file is recommended to insure accented and multi-byte characters function properly.

When this option is not in effect, file and folder permissions are relaxed. This could constitute a security risk so it is recommended that you enable Strict Permissions. However, on some servers Zenphoto does not function correctly with strict file/folder permissions. If you enable this option and Zenphoto has permission errors, run setup again and disable the option.

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NOTE: This option applies only to new files and folders created by Zenphoto. You may have to change permissions on existing ones to resolve problems.

Perhaps there was a problem with the upload. You should check the following files:
themes/effervescence_plus/404.php
themes/effervescence_plus/album.php
themes/effervescence_plus/archive.php
themes/effervescence_plus/contact.php
themes/effervescence_plus/customfunctions.php
themes/effervescence_plus/gallery.php
themes/effervescence_plus/image.php
themes/effervescence_plus/images/25percent.png
themes/effervescence_plus/images/50percent.png
themes/effervescence_plus/images/50percentwhite.png
themes/effervescence_plus/images/arrow_right.png
themes/effervescence_plus/images/dark-bullet.png
themes/effervescence_plus/images/dark_arrow_right.png
themes/effervescence_plus/images/err-passwordprotected.gif
themes/effervescence_plus/images/imageDefault.png
themes/effervescence_plus/images/logo.png
themes/effervescence_plus/images/multimediaDefault.png
themes/effervescence_plus/images/search.png
themes/effervescence_plus/images/slimbox/closelabel.gif
themes/effervescence_plus/images/slimbox/loading.gif
themes/effervescence_plus/images/slimbox/nextlabel.gif
themes/effervescence_plus/images/slimbox/prevlabel.gif
themes/effervescence_plus/images/smooth/carrow1.gif
themes/effervescence_plus/images/smooth/carrow2.gif
themes/effervescence_plus/images/smooth/fleche1.gif
themes/effervescence_plus/images/smooth/fleche1.png
themes/effervescence_plus/images/smooth/fleche2.gif
themes/effervescence_plus/images/smooth/fleche2.png
themes/effervescence_plus/images/smooth/loading-bar-black.gif
themes/effervescence_plus/images/smooth/open.gif
themes/effervescence_plus/images/smooth/open.png
themes/effervescence_plus/images/zen-logo.jpg
themes/effervescence_plus/index.php
themes/effervescence_plus/indexpage.php
themes/effervescence_plus/jd.gallery.css
themes/effervescence_plus/news.php
themes/effervescence_plus/pages.php
themes/effervescence_plus/password.php
themes/effervescence_plus/register.php
themes/effervescence_plus/scripts/bluranchors.js
themes/effervescence_plus/scripts/jd.gallery.js
themes/effervescence_plus/scripts/jd.gallery.set.js
themes/effervescence_plus/scripts/jd.gallery.transitions.js
themes/effervescence_plus/scripts/mootools.v1.11.js
themes/effervescence_plus/scripts/slimbox.js
themes/effervescence_plus/scripts/swfobject.js
themes/effervescence_plus/search.php
themes/effervescence_plus/sidebar.php
themes/effervescence_plus/simpleviewer.swf
themes/effervescence_plus/slideshow-controls.png
themes/effervescence_plus/slideshow.css
themes/effervescence_plus/slideshow.php
themes/effervescence_plus/slimbox.css
themes/effervescence_plus/styles/blue and green play.css
themes/effervescence_plus/styles/effervescence.css
themes/effervescence_plus/styles/free chocolates.css
themes/effervescence_plus/styles/kish-my father.css
themes/effervescence_plus/styles/machu picchu.css
themes/effervescence_plus/styles/oktoberfest.css
themes/effervescence_plus/styles/poolside.css
themes/effervescence_plus/styles/see you again.css
themes/effervescence_plus/theme.jpg
themes/effervescence_plus/themeoptions.php
themes/effervescence_plus/theme_description.php
themes/example/404.php
themes/example/album.php
themes/example/archive.php
themes/example/contact.php
themes/example/image.php
themes/example/index.php
themes/example/password.php
themes/example/register.php
themes/example/search.php
themes/example/slideshow-controls-old.png
themes/example/slideshow-controls.png
themes/example/slideshow.css
themes/example/slideshow.php
themes/example/tag.png
themes/example/theme.png
themes/example/themeoptions.php
themes/example/theme_description.php
themes/example/zen.css
themes/stopdesign/404.php
themes/stopdesign/album.php
themes/stopdesign/comment.php
themes/stopdesign/comment_form.php
themes/stopdesign/contact.php
themes/stopdesign/css/comments-hide.css
themes/stopdesign/css/comments-show.css
themes/stopdesign/css/custom.css
themes/stopdesign/css/master.css
themes/stopdesign/css/photos.css
themes/stopdesign/gallery.php
themes/stopdesign/image.php
themes/stopdesign/images/50percent.png
themes/stopdesign/images/bg_gal.gif
themes/stopdesign/images/bg_gal.png
themes/stopdesign/images/bg_page.jpg
themes/stopdesign/images/bg_path.gif
themes/stopdesign/images/bg_shadow.png
themes/stopdesign/images/bg_slide.gif
themes/stopdesign/images/bg_slide.png
themes/stopdesign/images/bg_slide_sm.gif
themes/stopdesign/images/bg_slide_sm.png
themes/stopdesign/images/btn_add_a_comment.gif
themes/stopdesign/images/btn_all_favorites.gif
themes/stopdesign/images/btn_gallery_archive.gif
themes/stopdesign/images/btn_go.gif
themes/stopdesign/images/btn_hide.gif
themes/stopdesign/images/btn_preview.gif
themes/stopdesign/images/btn_rss.gif
themes/stopdesign/images/btn_save.gif
themes/stopdesign/images/btn_show.gif
themes/stopdesign/images/btn_submit.gif
themes/stopdesign/images/btn_view_gallery.gif
themes/stopdesign/images/bullet_white.gif
themes/stopdesign/images/canon_sd10.jpg
themes/stopdesign/images/divider_l.gif
themes/stopdesign/images/divider_l.png
themes/stopdesign/images/divider_r.gif
themes/stopdesign/images/divider_r.png
themes/stopdesign/images/err-passwordprotected.gif
themes/stopdesign/images/icon_pushpin.gif
themes/stopdesign/images/imageDefault.png
themes/stopdesign/images/moreslide_next.gif
themes/stopdesign/images/moreslide_prev.gif
themes/stopdesign/images/photonav_next.gif
themes/stopdesign/images/photonav_next.png
themes/stopdesign/images/photonav_prev.gif
themes/stopdesign/images/photonav_prev.png
themes/stopdesign/images/slide_minis.gif
themes/stopdesign/images/txt_backward.gif
themes/stopdesign/images/txt_forward.gif
themes/stopdesign/index.php
themes/stopdesign/js/comments.js
themes/stopdesign/normalizer.php
themes/stopdesign/password.php
themes/stopdesign/register.php
themes/stopdesign/search.php
themes/stopdesign/slideshow-controls.png
themes/stopdesign/slideshow.css
themes/stopdesign/slideshow.php
themes/stopdesign/theme.png
themes/stopdesign/themeoptions.php
themes/stopdesign/theme_description.php
zp-core/admin-edit.php
zp-core/admin-functions.php
zp-core/admin.css
zp-core/admin.php
zp-core/images/zen-logo.gif
zp-core/plugins/contact_form/form.php
zp-core/plugins/rating/update.php
zp-core/plugins/static_html_cache.php
zp-core/plugins/tiny_mce/plugins/ajaxfilemanager/session/gc_counter.ajax.php
zp-core/plugins/tiny_mce/plugins/ajaxfilemanager/session/gc_log.ajax.php
zp-core/plugins/zenpage/admin-categories.php
zp-core/plugins/zenpage/admin-news-articles.php
zp-core/plugins/zenpage/admin-pages.php