I upgraded four sites from WordPress 2.6.5 to WordPress 2.7. The upgrading went smooth except for one problem, and that is host compatiblity problem. I’m guessing here but I think it is really the problem.
First of all, I upgraded Sehdi.com from WordPress 2.6.5 to WordPress 2.7 but every time I accessed the dashboard and the other pages, the pages were hanging or crashing. I always had to refresh the pages. I thought it was just a browser problem. To find out, I upgraded Weggis.net hosted at another web host. The upgrade went fine. I had no problems at all.
With that, I upgraded SofieHofmann.com hosted at the web host where Sehdi.com is being hosted as well, just to see if my guess was right. I had the same problem accessing the dashboard and other pages. To confirm if the problem was really host compatibility, I upgraded Psap-parola.org hosted at another web host, but not where Weggis.net is being hosted. Upgrading Psap-parola.org from WordPress 2.6.5 to WordPress 2.7 went fine too.
I even used both Safari and Firefox just to test if it was indeed a browser problem but using both these browsers, the pages at Sehdi.com and SofieHofmann.com were still hanging and crashing.
Sehdi.com, Sofiehofmann.com and Psap-parola.org are being hosted here in Switzerland. What I like about my web hosts here is that, the pages are fast when being downloaded. Weggis.net is being hosted at Dreamhost. It is also fast but honestly, as I see it, not as fast as the three other sites hosted here in Switzerland.
I planned to transfer Sehdi.com and Sofiehofmann.com to another web host but I thought that it would take a lot of work as I have other sites riding on one of those domains. And so, as much I did not like doing it, I downgraded Sehdi.com and SofieHofman.com from WordPress 2.7 to WordPress 2.6.5.
I plan to upgrade these two sites once I already transferred them to another web host, and most probably one will be at Dreamhost. One problem I have if I transfer all the other sites to the other web host here in Switzerland, some Swiss web hosts are too security problem conscious (safe_mode is on), and so the built-in automatic upgrade of WordPress will not be put into use. I already tested it.
I could not even use the flash image uploader and the plugin automatic upgrade of WordPress as safe_mode is on. I can always ask my web hosts to turn it off but I think the way they think too. So I’ll just transfer the other one at Dreamhost. With Dreamhost, I can make use of the one-click install and one-click upgrade for plugins and same with the new automatic WordPress upgrade feature every time there is going to have a new version or release of WordPress.
I still have five more sites to upgrade, but having problem like this, I have to delay upgrading them until I will be able to transfer them to another web host.
I tried to fix the mod_security problem with the following codes at the .htaccess but nothing happened. I still can not use the flash image uploader and the plugin automatic upgrade features. I haven’t tried the other possibilities of solving this but if you have any tips, I will definitely appreciate it.
<ifmodule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</ifmodule>
Well then, if you are upgrading to WordPress 2.7, make sure that your web host have tested WordPress 2.7. I checked what my other web host have at this time, it is still WordPress 2.3.3. But I no longer use their tools, I install whatever I need to install on my own. The other web host, at least, they have WordPress 2.6.1.
Dreamhost has the latest WordPress 2.7, of course. Did you notice that I’m loving Dreamhost now? Oh well!
Related Links: Dreamhost, WordPress
Update:
I just thought that I should give you the link to check which web hosts are compatible with WordPress 2.7, hop on to Core Update Host Compatibility. If your web host is not on the list, ask your web host then.
I also did not discuss anything about the features and other problems here except host compatibility problem as I know a lot of people have written about it already. For example, Lorelle have written a very good article, some tips on upgrading to WordPress 2.7, hop on to Lorelle on WordPress – WordPress 2.7 Upgrade Tips.
Regarding the process on upgrading, do the usual. You can go back reading my other posts too as the process is still the same or hop on to WordPress and read Upgrading WordPress for instructions.