I would like to sum up the problems encountered with XAMPP 1.7.0 for Windows, and the possible fixes (maybe for 1.7.0a ?):
Xampp 1.7 security 403 error on vista - link
A 403 error page appears when trying to access the security pages on Vista.
To fix:
In apache/conf/extra/httpd-xampp.conf :
Line 28: replace
Allow from localhost
with
Allow from 127.0.0.1
Line 60: replace
Allow from localhost
with
Allow from 127.0.0.1
This fix works for any version of Windows.
Enabling eaccelerator makes Apache/PHP crash
To fix:
Don't activate eAccelerator, the shipped version is built against PHP 5.2.7 instead of PHP 5.2.8
A new build of eAccelerator is needed.
MySQL with InnoDB enabled crashes at startup
To fix :
If you resued an older my.cnf file, check for deprecated config variables (such as "innodb_log_arch_dir")
Apache crashes when trying to access a website with xdebug enabled - link
To fix:
No fix found yet, probably the problem is the same as for eAccelerator. See the link for a temporarly fix.
Don't hesitate to correct me if I'm wrong or add info