AcctMgr creates blank lines in password_file under Windows

[Jeremy Dunn]

Every time the AcctMgr plugin accesses the configured Password_file, it adds an extra blank line after each line in the file. First save, file doubles in size, then triples, etc. I have only 73 users, but the file was 125MB. Eventually trac runs out of memory when trying to do any operation.

AcctMgr plugin 0.3dev r9591 
Trac v0.12.  Python v2.5.  Windows 2008 R2

Trac.ini:
[account-manager]
account_changes_notify_addresses = <removed>
force_passwd_change = true
htdigest_realm = trac
notify_actions = new
password_file = c:\TracRoot\tracusers.txt
password_store = HtDigestStore
user_lock_max_time = 0

I had every feature enabled except registration. For the moment I've disabled everything, which is why the lines are commented-out:

[components]
#acct_mgr.admin.* = enabled
#acct_mgr.admin.accountmanageradminpage = enabled
#acct_mgr.api.* = enabled
#acct_mgr.api.accountmanager = enabled
#acct_mgr.db.* = enabled
#acct_mgr.db.sessionstore = disabled
#acct_mgr.guard.accountguard = enabled
#acct_mgr.htfile.* = enabled
#acct_mgr.http.* = enabled
#acct_mgr.notification.* = enabled
#acct_mgr.pwhash.* = enabled
#acct_mgr.svnserve.* = enabled
#acct_mgr.web_ui.* = enabled
#acct_mgr.web_ui.accountmodule = enabled
#acct_mgr.web_ui.loginmodule = enabled
#acct_mgr.web_ui.registrationmodule = disabled

[anonymous]

this might be related to [9272] since it mentions EOL values. I suspect the issue is something different between *nix and Windows. I'm a programmer but not a Python programmer so I'm sorry I cannot contribute a solution.