wrong permissions on uploaded php scripts

Have you compared the contents of the file as uploaded by bzr-upload with the one uploaded by nautilus? Are you sure this isn't just a bug in your php script?

I tried nautlius (the exact same php scripts + contents) and the server did display my page as on my machine.
I tried with git-ftp (the exact same php scripts + contents) and it also worked without any problems.

bzr upload throws this nasty 500 Internal Server Error. I can reproduce this bug a 1000 times (because i already did that :) ) and the only way to make it work with bzr upload is to change the rwx flags...

this does only affekt php scripts. I can download any other resource (.swf, .png, .jpg).

maybe bzr upload is missing some ftp communication to complete the request faultless?

I'll try to reproduce this on another ftp server!

i also reproduced the same behaviour on a telekom.at ftp server.
This is what i did:
rich@rich-laptop:~$ mkdir test
rich@rich-laptop:~$ cd test/
rich@rich-laptop:~/test$ echo "<?php echo 'this is a bzr upload test'; ?>" > test.php
rich@rich-laptop:~/test$ cat test.php
<?php echo 'this is a bzr upload test'; ?>
rich@rich-laptop:~/test$ bzr init
Created a standalone tree (format: 2a)
rich@rich-laptop:~/test$ bzr add test.php
adding test.php
rich@rich-laptop:~/test$ bzr commit -m "init"
Committing to: /home/rich/test/
added test.php
Committed revision 1.
rich@rich-laptop:~/test$ bzr upload ftp://b9627xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.bon.at/var/www/html/
FTP b9627xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.bon.at password:
No uploaded revision id found, switching to full upload
Uploading test.php

accessing the test.php raises our old friend 500!

So, bzr-upload does a crc check when uploading files, so it is most likely not corrupted, but rather has a different set of permissions than other files, I'd guess the execute bit.
Try doing an "ls -l" on the remote directory, and take a look at what the differences are between that file and the others.

I tested the uploaded file of bzr:
-rw-rw-r-- 1 theusername theusername 44 Aug 23 09:36 test.php

then I executed:
chmod 764 test.php
200 SITE CHMOD command successful
-rwxrw-r-- 1 theusername theusername 44 Aug 23 09:36 test.php

BUT the file is still not working through the webserver!

Natuilus produces this file:
-rw-r--r-- 1 theusername theusername 44 Aug 23 09:41 test.php

and if i set via chmod 644 after bzr upload there is error 500!

so it depends on the user write flag!

EDIT:

and if i set via chmod 644 after bzr upload there is !!!NO!!! error 500!

Right, so it's not a content problem but rather a permission problem.
And probably specific to your server.

There are plans to implement a user option to define default permission bits, but in the mean time,
you can try to hack the source:

   modified __init__.py

=== modified file '__init__.py'
--- __init__.py 2010-05-25 07:01:24 +0000
+++ __init__.py 2010-08-23 08:15:26 +0000
@@ -336,7 +336,7 @@
             if self.tree.is_executable(id):
                 mode = 0775
             else:
- mode = 0664
+ mode = 0644
         if not self.quiet:
             self.outf.write('Uploading %s\n' % relpath)
         self._up_put_bytes(relpath, self.tree.get_file_text(id), mode)

Should be enough to address your case, be sure to try it on a *new* uploaded file though.