IE 11 hang on large list of thumbnails

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I have added a prophoto block to one of our concrete5 pages.
This prophoto block uses an album of about 100 pictures.
This page is displayed just fine with Firefox and Chrome, but IE 11 hangs as soon as the thumbnails should be displayed. If I reduce the window size so that the thumbnails are not visible it is fine, but with thumbnails visible it hangs.
Sometimes it comes back with the thumbnails after a long time, sometimes it is dead forever.

Are you aware of such a problem?
Is there something I can do with it beside from reducing the number of pictures?

Type: Ticket
Status: New
uwoehler
View Replies:

concrete5 Environment Information

# concrete5 Version
5.6.3.2

# concrete5 Packages
Anmelden (1.1.1), Automatic Email Obfuscator (1.2.3), Fancy Image Links (1.3.8), Galleria image gallery (2.0), List files from set (1.0.4), Popup Login (1.0.5), Power Slider Lite (1.1.1), ProPhoto Browser (3.08), Vanilla Forums (1.0.4).

# concrete5 Overrides
blocks/autonav, controllers/login.php, elements/profile, languages/de_DE, models/user_list.php, single_pages/members.php, single_pages/register.php, single_pages/login.php, single_pages/profile, themes/mug

# concrete5 Cache Settings
Block Cache - Off
Overrides Cache - On
Full Page Caching - Off

# Server Software
Apache/2.4.7 (Ubuntu)

# Server API
apache2handler

# PHP Version
5.5.9-1ubuntu4.6

# PHP Extensions
apache2handler, apc, apcu, bcmath, bz2, calendar, Core, ctype, curl, date, dba, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, imagick, intl, json, libxml, mbstring, mhash, mysql, mysqli, openssl, pcre, PDO, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, readline, Reflection, session, shmop, SimpleXML, soap, sockets, SPL, sqlite3, standard, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xml, xmlreader, xmlwriter, Zend OPcache, zip, zlib.

# PHP Settings
max_execution_time - 30
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - 60
max_input_vars - 1000
memory_limit - 128M
post_max_size - 400M
sql.safe_mode - Off
upload_max_filesize - 400M
mysql.max_links - Unlimited
mysql.max_persistent - Unlimited
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
pgsql.max_links - Unlimited
pgsql.max_persistent - Unlimited
session.cache_limiter - nocache
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
opcache.max_accelerated_files - 2000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5

Browser User-Agent String

IE 11

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