concrete5 Environment Information
# concrete5 Version
Core Version - 5.7.5.4
Version Installed - 5.7.5.4
Database Version - 20151221000000
# concrete5 Packages
Background Image Slideshow (1.0.2), Buttons Pro (1.3.7), C5Extras YouTube Channel (2.1.2), Call to Action Pro (1.0.0), Honest Websites Back To Top (0.9.4), HonestWebsites Simple testimonials (1.0.0), HonestWebsites Store location (1.2.4), List files from set (1.0.10), Mega Menu (1.5.37), PDF Viewer (1.0.1), ProEvents (2.7.2), Responsive Embed (1.0.0), Ronyd Expanded Search Bar (2.0), Spacer (0.9.3), Supermint Theme (3.3.1.3), Touch Gallery (2.0.9), Video Pro (1.0.0), Whale OWL Carousel (1.4.1).
# concrete5 Overrides
languages/pl_PL/LC_MESSAGES/messages.mo, languages/pl_PL/LC_MESSAGES, languages/pl_PL, languages/nl_NL/LC_MESSAGES/messages.mo, languages/nl_NL/LC_MESSAGES, languages/nl_NL, languages/da_DK/LC_MESSAGES/messages.mo, languages/da_DK/LC_MESSAGES, languages/da_DK, languages/sv_SE/LC_MESSAGES/messages.mo, languages/sv_SE/LC_MESSAGES, languages/sv_SE, languages/ja_JP/LC_MESSAGES/messages.mo, languages/ja_JP/LC_MESSAGES, languages/ja_JP, languages/ru_RU/LC_MESSAGES/messages.mo, languages/ru_RU/LC_MESSAGES, languages/ru_RU, languages/el_GR/LC_MESSAGES/messages.mo, languages/el_GR/LC_MESSAGES, languages/el_GR, languages/tr_TR/LC_MESSAGES/messages.mo, languages/tr_TR/LC_MESSAGES, languages/tr_TR, languages/fr_FR/LC_MESSAGES/messages.mo, languages/fr_FR/LC_MESSAGES, languages/fr_FR, languages/nb_NO/LC_MESSAGES/messages.mo, languages/nb_NO/LC_MESSAGES, languages/nb_NO, languages/de_DE/LC_MESSAGES/messages.mo, languages/de_DE/LC_MESSAGES, languages/de_DE, languages/fi_FI/LC_MESSAGES/messages.mo, languages/fi_FI/LC_MESSAGES, languages/fi_FI, languages/pt_BR/LC_MESSAGES/messages.mo, languages/pt_BR/LC_MESSAGES, languages/pt_BR, languages/it_IT/LC_MESSAGES/messages.mo, languages/it_IT/LC_MESSAGES, languages/it_IT, languages/pl_PL/LC_MESSAGES/messages.mo, languages/pl_PL/LC_MESSAGES, languages/pl_PL, languages/nl_NL/LC_MESSAGES/messages.mo, languages/nl_NL/LC_MESSAGES, languages/nl_NL, languages/da_DK/LC_MESSAGES/messages.mo, languages/da_DK/LC_MESSAGES, languages/da_DK, languages/sv_SE/LC_MESSAGES/messages.mo, languages/sv_SE/LC_MESSAGES, languages/sv_SE, languages/ja_JP/LC_MESSAGES/messages.mo, languages/ja_JP/LC_MESSAGES, languages/ja_JP, languages/ru_RU/LC_MESSAGES/messages.mo, languages/ru_RU/LC_MESSAGES, languages/ru_RU, languages/el_GR/LC_MESSAGES/messages.mo, languages/el_GR/LC_MESSAGES, languages/el_GR, languages/tr_TR/LC_MESSAGES/messages.mo, languages/tr_TR/LC_MESSAGES, languages/tr_TR, languages/fr_FR/LC_MESSAGES/messages.mo, languages/fr_FR/LC_MESSAGES, languages/fr_FR, languages/nb_NO/LC_MESSAGES/messages.mo, languages/nb_NO/LC_MESSAGES, languages/nb_NO, languages/de_DE/LC_MESSAGES/messages.mo, languages/de_DE/LC_MESSAGES, languages/de_DE, languages/fi_FI/LC_MESSAGES/messages.mo, languages/fi_FI/LC_MESSAGES, languages/fi_FI, languages/pt_BR/LC_MESSAGES/messages.mo, languages/pt_BR/LC_MESSAGES, languages/pt_BR, languages/it_IT/LC_MESSAGES/messages.mo, languages/it_IT/LC_MESSAGES, languages/it_IT
# concrete5 Cache Settings
Block Cache - On
Overrides Cache - On
Full Page Caching - Off
Full Page Cache Lifetime - Every 6 hours (default setting).
# Server Software
Apache/2.2.16 (Debian)
# Server API
apache2handler
# PHP Version
5.3.3-7+squeeze28
# PHP Extensions
apache2handler, bcmath, bz2, calendar, Core, ctype, curl, date, dba, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, json, libxml, mbstring, mhash, mysql, mysqli, openssl, pcre, PDO, pdo_mysql, pdo_pgsql, pgsql, Phar, posix, Reflection, session, shmop, SimpleXML, soap, sockets, SPL, standard, suhosin, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xml, xmlreader, xmlwriter, 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 - 12M
safe_mode - Off
safe_mode_exec_dir - <i>no value</i>
safe_mode_gid - Off
safe_mode_include_dir - <i>no value</i>
sql.safe_mode - Off
upload_max_filesize - 12M
mysql.max_links - Unlimited
mysql.max_persistent - Unlimited
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 100000
pcre.recursion_limit - 100000
pgsql.max_links - Unlimited
pgsql.max_persistent - Unlimited
session.cache_limiter - <i>no value</i>
session.gc_maxlifetime - 1440
soap.wsdl_cache_limit - 5
safe_mode_allowed_env_vars - PHP_
safe_mode_protected_env_vars - LD_LIBRARY_PATH
suhosin.cookie.max_array_depth - 50
suhosin.cookie.max_array_index_length - 64
suhosin.cookie.max_name_length - 64
suhosin.cookie.max_totalname_length - 256
suhosin.cookie.max_value_length - 10000
suhosin.cookie.max_vars - 100
suhosin.executor.include.max_traversal - 0
suhosin.executor.max_depth - 0
suhosin.get.max_array_depth - 50
suhosin.get.max_array_index_length - 64
suhosin.get.max_name_length - 64
suhosin.get.max_totalname_length - 256
suhosin.get.max_value_length - 512
suhosin.get.max_vars - 100
suhosin.log.phpscript.is_safe - Off
suhosin.memory_limit - 0
suhosin.post.max_array_depth - 50
suhosin.post.max_array_index_length - 64
suhosin.post.max_name_length - 64
suhosin.post.max_totalname_length - 256
suhosin.post.max_value_length - 1000000
suhosin.post.max_vars - 1000
suhosin.request.max_array_depth - 50
suhosin.request.max_array_index_length - 64
suhosin.request.max_totalname_length - 256
suhosin.request.max_value_length - 1000000
suhosin.request.max_varname_length - 64
suhosin.request.max_vars - 1000
suhosin.session.max_id_length - 128
suhosin.upload.max_uploads - 25
The only way I can think of (other that making every word the same length) would be to add the same class to each button (you can do that when adding the button to the page, it's in the first tab at the bottom of the setting screen) and then to add styling to your site's css sheet for that class to set the width you want.
Another option wold be to use the button bar block instead. That wouldn't change the fact that each button would have a different width, but you might find it more aesthetically pleasing.
If you have problems implementing one or the other of these 2 options, please let me know and I'll be glad to help.