FormBuilder; forms can`t be sent after upgrading

[Trenia]

Hi

Before upgrading FormBuilder from 0.8 to latest version (0.8.1.1), forms were working fine. After upgrading nothing happened when hitting submit to send. Had to remove and reinstall old version to make it work again. Good thing I had xml backup files of both forms which had to be reinstalled after removing latest version.

Same problem occours in cmsms versions 1.11.11 and 1.11.13.

A bug in FormBuilder 0.8.1.1?

Modules:
CGExtensions 1.45
CMSMailer 5.2.2
CMSPrinting 1.0.5
Captcha 0.5.2
DewPlayer 0.2.1
FormBuilder (x.x)
FileManager 1.4.5
Gallery 2.0.1
Guestbook 1.4_RC2
MenuManager 1.8.6
MicroTiny 1.2.9
ModuleManager 1.5.8
News 2.15
Printing 1.1.2
Search 1.7.12
SiteMapMadeSimple 1.2.8
Smileys 0.9.0
ThemeManager 1.1.8
TinyMCE 2.9.12
vimeoplayer 1.1