http://www.stripcreator.com/forums/showthread.php?postnum=218639&page=1

http://www.stripcreator.com/forums/showthread.php?postnum=218639&page=80

http://www.stripcreator.com/forums/showthread.php?postnum=218639&page=140

http://www.stripcreator.com/forums/showthread.php?postnum=218639&page=141

http://www.stripcreator.com/forums/showthread.php?postnum=218639&page=142

It looks like I can visit page 140 or earlier of this thread with no problem, but pages 141 and 142 don't work.  The error message is just the words "invalid topic" on an otherwise blank page.

Actually, I think the problem may be that it's listed as having 142 pages, but only actually has 140.  The latest post on page 140 is from yesterday.

Were some posts deleted from this thread recently?

This appears to be the longest thread in the forum.  Other potential contenders:

The Ultimate Run-on Sentence, 80 pages

I Am a Colossal Geek, 81 pages

Tattoo Barbie, 116 pages

I was wrong.  "Beat the Picture" in FGH supposedly has 145 pages and is also bugged.

http://www.stripcreator.com/forums/showthread.php?postnum=197848&page=1 - OK

http://www.stripcreator.com/forums/showthread.php?postnum=197848&page=80 - OK

http://www.stripcreator.com/forums/showthread.php?postnum=197848&page=143 - OK

http://www.stripcreator.com/forums/showthread.php?postnum=197848&page=144 - invalid topic

http://www.stripcreator.com/forums/showthread.php?postnum=197848&page=145 - invalid topic

In RMDC, ragu4u's How's this? is still fine at 137 pages.

I think D's nailed the issue - out of curiosity I posted in announcements just now, that worked but it appears on page 140, and 141/142 are still as described above. Had to go to p140 to do it.