If you faced a character problem in Category Titles in Blog Site Template for different language , may be this article helps you. In my envoriment i am using Turkish Language Pack (1055) .
the repro is not tested on other languages but it  should be occurs for other languages which is contains specific characters .

I think this  problem is a minor bug .You can reproduce it easily .

Here the Repro steps.
1) Install or find SPS2010 + SP1Dec2011 CU + TR(1055) language pack installed machine.
2) Create a site collection in Turkish
3) Create a “Web Günlüğü”  (Blog Site Instance)
4) Add some categories that contains Turkish Characters.
5) Click one of this category titles in left navigation  and open category page

I have created a category named : “Yağlı Boya Seçmeleri”  You can see the problem bellowed screenshot.

The problem is when rendering left panel Categories web part (XSTLListView) not encode url of Link object correctly. I have tested with changing the link in browser’s address bar with correct encoding the titiles shown correctly on category page.

So There  is a workaround for fixing this issue with using Sharepoint Designer 2010 .

1) Open defauılt aspx and (any needed page) in Sharepoint Designer.

2) Select one of the link  in Categories  XsltListViewWebpart

3) Click the HyperLinkOptions button.

4) Change the default value of
{$HttpVDir}/{$thisNode/../@resource.wss.lists_Folder}/{$thisNode/../@resource.wss.blogcategories_Folder}/Category.aspx?CategoryId={$thisNode/@ID}&Name={$CategoryTitle} as
{$HttpVDir}/{$thisNode/../@resource.wss.lists_Folder}/{$thisNode/../@resource.wss.blogcategories_Folder}/Category.aspx?CategoryId={$thisNode/@ID}&Name={$thisNode/@Title}

5) Repeat same options for all needed pages.

And Open and Check  again your blog page :

(For who know Turkish the word of “Şeçme” have a little typo correct word is “Seçme” . Dont worry about it . i am not get all screenshot again for fixing this :)

See you next article.

So what you can do :

Here is the command for force the sync operations.

stsadm -o sync -ignoreisactive 1
stsadm -o sync -deleteolddatabases 0
stsadm -o sync -synctiming m:5
stsadm -o sync -sweeptiming m:5
stsadm -o sync

Wait min 5 minutes. and check.

You can get more information about stsadm -o sync operations.
http://technet.microsoft.com/en-us/library/cc263196(office.12).aspx
If this is not solve your problem you can use fallowing tool for a workaround;
http://blog.bugrapostaci.com/2012/01/22/sharepoint-tools-wsscontentdbsync-v1-0-command-line-tool/

FileLock is vey simple tool that locking defined file in given path. This tool can be used acting as AV programs , troublesoothing or reproduce error when a file is locked scenarios .
You can download binaries or source from :

http://spstools.codeplex.com/releases/view/80978

You can use this tool when common problem has occured with your users Wellcome name is not updated even if you try the tradational ways.
it’s a command line tool that using Sharepoint Object Model so you can only run this tool on sharepoint installed servers.

The tool has compare your profile store and your content database UserInfo table and find out that not updated (sync) usernames and emails and if you want it equalize these problematic names.

Usage  :
WssContentDBSync <Site Collection Url> <Equalize:true:false> [AccountName]

Parameters:
Site Collection Url (Required) : For your site url
Equalize (Required)  : if you select true , the tool equalize your users name and email within user profile prefferedname and workemail. if you select false , it will just report mismatch issues not execute any sync operation .
AccountName : to be a domain account name. it only sync or report the given accounts status.

Examples:
WssContentDBSync http://blog.bugrapostaci.com true
WssContentDBSync http://blog.bugrapostaci.com true Blog\bugra

For Download :
http://spstools.codeplex.com/releases/view/80949
WssContentDBSync x86 can be used 32 bit Sharepoint 2007 systems.
WssContentDBSync x64 can be used 64 bit  Sharepoint 2007 systems
!!! Not tested for Sharepoint 2010 .

WssDownload  tool has been relasead. You can use this tool for download all documents in a Document Library as preventing folder structure to your server harddrive.
If you wonder why have i developed this tool , consider a scenario that publishing feature is been corrupted or not activated and windows explorer view not running and you have hundreds of files in your library, how could you download them manuelly ? so i think it is clear that you can use it .

For Download.
http://spstools.codeplex.com/releases/view/80908

WssDownload x86 can be used 32 bit Sharepoint 2007 systems.
WssDownload x64 can be used both Moss2007 x64 and Sharepoint 2010 systems.

* This is a command tool that using sharepoint object model and should be run in sharepoint installed server

Usage:
WssDownload <site url> <library name> <download path>

Example:
WssDownload http://blog.bugrapostaci.com Presentations c:\\downloads