Hi all,
I hit a snag in a project I'm working on. For some reason umbraco suddenly refuses to save properties or save new doctype without throwing a "Input is in wrong format" error and I can't seem to get rid of it. It started when I added a Numeric field on a doctype and then the error popped up, so I removed that field again and the error remained but the field is now gone.  But for some reason now every doctype fails if is has a property on it, no matter which type, as well as when trying to created new ones. I have a single doctype without any properties which can be saved, except when trying to add properties of course.

Here's the error message.

Server Error in '/' Application.
Input string was not in a correct format.


[FormatException: Input string was not in a correct format.]
   System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase) +412
   System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData) +10972548
   System.Action`1.EndInvoke(IAsyncResult result) +0
   umbraco.controls.ContentTypeControlNew.EndAsyncSaveOperation(IAsyncResult ar) +342
   System.Web.UI.LegacyPageAsyncTask.CompleteTask(Boolean timedOut, Boolean syncTimeoutCaller) +263

[HttpException (0x80004005): Exception of type 'System.Web.HttpException' was thrown.]
   System.Web.UI.Page.ExecuteRegisteredAsyncTasks() +9530689
   umbraco.controls.ContentTypeControlNew.save_click(Object sender, EventArgs e) +683
   System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +116
   System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +101
   System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +9528682
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724


I'm using a couple of packages like, Archetype, multiurls and Umbraco Core Property Value Converters but they have worked great so far and have checked the logs files which basically gives the same information.

I've seen some old posts regarding the issue but the various fixes don't seem to apply here (like forcing a width in the RTE datatype)
Anybody experienced something like this before?

**EDIT**

I tried using a clean 7.1.4 install and hooked up the existing database and now I can save data and properties so I guess the issue originates from one of those packages.