Fatal error issue...help?

[Moxi]

Tonight when I went to check some permissions for one of my usergroups in my admincp, I couldn't access any of my usergroup settings or the "add new usergroup" sections, when I tried to do so it returned this error:
Fatal error: Cannot use string offset as an array in /home/sskies/public_html/includes/class_bitfield_builder.php on line 312

I'm not even sure what this even means?

I was able to access everything else in my admincp without problem (except the administrator permissions area, which returned the same error), but I haven't changed anything anytime recently, and I know it was working a few weeks ago. I have no idea what might be causing the problem. Does anyone have any idea what might be causing the problem or what I can do to fix it?

I'm using version 3.5.0 and I have a number of mods installed, but again, it was working fine recently and I haven't changed any files or templates or anything at all in months probably, short of adding a couple new usergroups. I think my host might have recently upgraded from php4 to php5, might this have anything to do with it?

Any help would be greatly appreciated
Thanks in advance!

[G0F0RBR0KE]

This could be due to a modification not removed proper.

[Moxi]

I haven't removed anything in months though This has just started happening within the last week or two at most.

[G0F0RBR0KE]

Do a table repair.

[Moxi]

I tried but it just sat at the "please wait" screen and didn't do anything :\

[Boofo]

Did you make sure to check the boxes (as in Check all)? You will get that screen if you do not check any boxes, too.

[Moxi]

Haha, I'm such a ditz sometimes. I did it again, this time being sure to check all the boxes, but I'm still getting the error message when I try to access my usergroups

[G0F0RBR0KE]

Try repairing the tables in myphpadmin

[Moxi]

Still no luck

[Marco van Herwaarden]

I doubt this has anything to do with table corruption. Most likely cause is a modifcation that does not work correct on your new PHP/MySQL versions.

Also please upgrade your vBulletin, the version you are using is very outdated and might also be causing problems with newer PHP/MySQL versions.

You could start by disabling modifications from your config.php and see if that solves the error.

Otherwise create a test board (duplicate of production) and start uninstalling modification on your test install until problem is solved.