diff -u -r ojs-2.3.0-mod/classes/issue/form/IssueForm.inc.php ojs-2.3.0/classes/issue/form/IssueForm.inc.php
--- ojs-2.3.0-mod/classes/issue/form/IssueForm.inc.php	2009-05-27 12:27:06.000000000 -0700
+++ ojs-2.3.0/classes/issue/form/IssueForm.inc.php	2011-06-20 11:32:26.000000000 -0700
@@ -353,7 +353,8 @@
 		if ($publicFileManager->uploadedFileExists('coverPage')) {
 			$journal = Request::getJournal();
 			$originalFileName = $publicFileManager->getUploadedFileName('coverPage');
-			$newFileName = 'cover_issue_' . $issueId . '_' . $this->getFormLocale() . '.' . $publicFileManager->getExtension($originalFileName);
+			$type = $publicFileManager->getUploadedFileType('coverPage');
+			$newFileName = 'cover_issue_' . $issueId . '_' . $this->getFormLocale() . $publicFileManager->getImageExtension($type);
 			$publicFileManager->uploadJournalFile($journal->getJournalId(), 'coverPage', $newFileName);
 			$issue->setOriginalFileName($publicFileManager->truncateFileName($originalFileName, 127), $this->getFormLocale());
 			$issue->setFileName($newFileName, $this->getFormLocale());
diff -u -r ojs-2.3.0-mod/classes/submission/form/MetadataForm.inc.php ojs-2.3.0/classes/submission/form/MetadataForm.inc.php
--- ojs-2.3.0-mod/classes/submission/form/MetadataForm.inc.php	2011-06-20 11:25:22.000000000 -0700
+++ ojs-2.3.0/classes/submission/form/MetadataForm.inc.php	2011-06-20 11:31:53.000000000 -0700
@@ -283,7 +283,8 @@
 		if ($publicFileManager->uploadedFileExists(COVER_PAGE_IMAGE_NAME)) {
 			$journal = Request::getJournal();
 			$originalFileName = $publicFileManager->getUploadedFileName(COVER_PAGE_IMAGE_NAME);
-			$newFileName = 'cover_article_' . $this->article->getArticleId() . '_' . $this->getFormLocale() . '.' . $publicFileManager->getExtension($originalFileName);
+			$type = $publicFileManager->getUploadedFileType(COVER_PAGE_IMAGE_NAME);
+			$newFileName = 'cover_article_' . $this->article->getArticleId() . '_' . $this->getFormLocale() . $publicFileManager->getImageExtension($type);
 			$publicFileManager->uploadJournalFile($journal->getJournalId(), COVER_PAGE_IMAGE_NAME, $newFileName);
 			$article->setOriginalFileName($publicFileManager->truncateFileName($originalFileName, 127), $this->getFormLocale());
 			$article->setFileName($newFileName, $this->getFormLocale());